I'm try to create an EJB3, hosted with JBoss. This is the steps that I have 
been taking by now:

JBoss 4.2.2 GA
J2EE 5 U3 with JDK 1.6
MyEclipse 5.5
MS SQL 2005 Express

Step 1: Create a new EJB Project AdminEJB with MyEclipse, Choose J2EE 5.0, 
setup connection driver and schema

Step 2: Use MyEclipse Derby to browse the database

Step 3: Use EJB3 Reverse Engineering to generate Beans from a table Admin 
[Username nvarchar(20) Pk, Password nvarchar(20)] (see the generated class)

/*****************************
  | * Admin Entity bean
  | ******************************/
  | 
  | /**
  |  * Admin generated by MyEclipse Persistence Tools
  |  */
  | @Entity
  | @Table(name = "Admin", schema = "dbo", catalog = "TungaRestaurant", 
uniqueConstraints = {})
  | public class Admin implements java.io.Serializable {
  | 
  |     private String username;
  |     private String password;
  | 
  |     /** default constructor */
  |     public Admin() {
  |     }
  | 
  |     /** full constructor */
  |     public Admin(String username, String password) {
  |             this.username = username;
  |             this.password = password;
  |     }
  | 
  |     // Property accessors
  |     @Id
  |     @Column(name = "Username", unique = true, nullable = false, insertable 
= true, updatable = true, length = 20)
  |     public String getUsername() {
  |             return this.username;
  |     }
  | 
  |     public void setUsername(String username) {
  |             this.username = username;
  |     }
  | 
  |     @Column(name = "Password", unique = false, nullable = false, insertable 
= true, updatable = true, length = 20)
  |     public String getPassword() {
  |             return this.password;
  |     }
  | 
  |     public void setPassword(String password) {
  |             this.password = password;
  |     }
  | 
  | }
  | 
  | /*****************************
  | * Admin Facade
  | ******************************/
  | 
  | /**
  |  * Facade for entity Admin.
  |  */
  | @Stateless
  | public class AdminFacade implements AdminFacadeLocal, AdminFacadeRemote {
  |     // property constants
  |     public static final String PASSWORD = "password";
  | 
  |     @PersistenceContext
  |     private EntityManager entityManager;
  | 
  |     public void save(Admin transientInstance) {
  |             EntityManagerHelper.log("saving Admin instance", Level.INFO, 
null);
  |             try {
  |                     entityManager.persist(transientInstance);
  |                     EntityManagerHelper.log("save successful", Level.INFO, 
null);
  |             } catch (RuntimeException re) {
  |                     EntityManagerHelper.log("save failed", Level.SEVERE, 
re);
  |                     throw re;
  |             }
  |     }
  | 
  |     public void delete(Admin persistentInstance) {
  |             EntityManagerHelper.log("deleting Admin instance", Level.INFO, 
null);
  |             try {
  |                     entityManager.remove(persistentInstance);
  |                     EntityManagerHelper.log("delete successful", 
Level.INFO, null);
  |             } catch (RuntimeException re) {
  |                     EntityManagerHelper.log("delete failed", Level.SEVERE, 
re);
  |                     throw re;
  |             }
  |     }
  | 
  |     public Admin update(Admin detachedInstance) {
  |             EntityManagerHelper.log("updating Admin instance", Level.INFO, 
null);
  |             try {
  |                     Admin result = entityManager.merge(detachedInstance);
  |                     EntityManagerHelper.log("update successful", 
Level.INFO, null);
  |                     return result;
  |             } catch (RuntimeException re) {
  |                     EntityManagerHelper.log("update failed", Level.SEVERE, 
re);
  |                     throw re;
  |             }
  |     }
  | 
  |     public Admin findById(String id) {
  |             EntityManagerHelper.log("finding Admin instance with id: " + id,
  |                             Level.INFO, null);
  |             try {
  |                     Admin instance = entityManager.find(Admin.class, id);
  |                     return instance;
  |             } catch (RuntimeException re) {
  |                     EntityManagerHelper.log("find failed", Level.SEVERE, 
re);
  |                     throw re;
  |             }
  |     }
  | 
  |     @SuppressWarnings("unchecked")
  |     public List<Admin> findByProperty(String propertyName, Object value) {
  |             EntityManagerHelper.log("finding Admin instance with property: "
  |                             + propertyName + ", value: " + value, 
Level.INFO, null);
  |             try {
  |                     String queryString = "select model from Admin model 
where model."
  |                                     + propertyName + "= :propertyValue";
  |                     return 
entityManager.createQuery(queryString).setParameter(
  |                                     "propertyValue", value).getResultList();
  |             } catch (RuntimeException re) {
  |                     EntityManagerHelper.log("find by property name failed",
  |                                     Level.SEVERE, re);
  |                     throw re;
  |             }
  |     }
  | 
  |     public List<Admin> findByPassword(Object password) {
  |             return findByProperty(PASSWORD, password);
  |     }
  | 
  |     @SuppressWarnings("unchecked")
  |     public List<Admin> findAll() {
  |             EntityManagerHelper
  |                             .log("finding all Admin instances", Level.INFO, 
null);
  |             try {
  |                     String queryString = "select model from Admin model";
  |                     return 
entityManager.createQuery(queryString).getResultList();
  |             } catch (RuntimeException re) {
  |                     EntityManagerHelper.log("find all failed", 
Level.SEVERE, re);
  |                     throw re;
  |             }
  |     }
  | }
  | 
  | /*****************************
  | * Local and Remote interfaces
  | ******************************/
  | 
  | @Local
  | public interface AdminFacadeLocal {
  |     public void save(Admin transientInstance);
  |     public void delete(Admin persistentInstance);
  |     public Admin update(Admin detachedInstance);
  |     public Admin findById(String id);
  |     public List findByProperty(String propertyName, Object value);
  |     public List findByPassword(Object password);
  | }
  | 
  | @Remote
  | public interface AdminFacadeRemote {
  |     public void save(Admin transientInstance);
  |     public void delete(Admin persistentInstance);
  |     public Admin update(Admin detachedInstance);
  |     public Admin findById(String id);
  |     public List findByProperty(String propertyName, Object value);
  |     public List findByPassword(Object password);
  | }

Step 3.1: Create persistence.xml

<?xml version="1.0" encoding="UTF-8"?>
  | <persistence xmlns="http://java.sun.com/xml/ns/persistence";
  |     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
  |     xsi:schemaLocation="http://java.sun.com/xml/ns/persistence
  |     http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd"; 
version="1.0">
  |     
  |     <persistence-unit name="AdminEJB" transaction-type="JTA">
  |             <jta-data-source>java:/MyDB</jta-data-source>
  |     </persistence-unit>
  |   
  | </persistence>

Step 4: Config Application Server JBoss 4.x

Step 4.1: copy sqljdbc.jar to server/default/lib

Step 4.2: Create datasource file: mssql-ds.xml
<?xml version="1.0" encoding="UTF-8"?>
  | 
  | <datasources>
  |    <local-tx-datasource>
  | 
  |       <jndi-name>MyDB</jndi-name>
  | 
  |       
<connection-url>jdbc:sqlserver://DUCNGUYEN-PC\\SQLEXPRESS:49378;database=AdventureWorks;</connection-url>
  | 
  |       <!-- The driver class -->
  |       
<driver-class>com.microsoft.sqlserver.jdbc.SQLServerDriver</driver-class>
  | 
  |       <!-- The login and password -->
  |       <user-name>sa</user-name>
  |       <password></password>
  | 
  |    </local-tx-datasource>
  | </datasources>

Step 5: Deloy AdminEJB within JBoss, start server (Everything is ok)

Step 6: Create a new Java Project with MyEclipse
           referenced build path all the jar file in JBOSS_HOME\client
           reference the deploy jar file con server/default/deploy

Step 7: Create jndi.properties in src folder with the following content:
java.naming.factory.initial=org.jnp.interfaces.NamingContextFactory
java.naming.factory.url.pkgs=org.jboss.naming:org.jnp.interfaces
java.naming.provider.url=localhost:1099

Step 8: Create log4j.properties in src folder with the following content
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n
log4j.rootLogger=debug, stdout

Step 9: create TestClient.java

public class TestClient {
  | 
  |     /**
  |      * @param args
  |      */
  |     public static void main(String[] args) {
  |             Context context;
  |             try             
  |             {
  |                     context = new InitialContext();
  |                     
  |                     AdminFacadeRemote adminMan = 
(AdminFacadeRemote)context.lookup(AdminFacade.RemoteJNDIName);
  | 
  |                     Admin admin = new Admin("admin","123");
  |                     adminMan.save(admin);
  | 
  |             } catch (NamingException e)
  |             {
  |                     e.printStackTrace();
  |             }
  | 
  |     }
  | }

Step 10: Run the client, this is when the funny thing happened, the first time 
when client runs, it gets java.lang.ExceptionInInitializerError
Please look at the stack trace
Exception in thread "main" javax.ejb.EJBException: java.lang.RuntimeException: 
java.lang.ExceptionInInitializerError
  |     at 
org.jboss.ejb3.tx.Ejb3TxPolicy.handleExceptionInOurTx(Ejb3TxPolicy.java:63)
  |     at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:83)
  |     at 
org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:191)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:76)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.ejb3.stateless.StatelessInstanceInterceptor.invoke(StatelessInstanceInterceptor.java:62)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.aspects.security.AuthenticationInterceptor.invoke(AuthenticationInterceptor.java:77)
  |     at 
org.jboss.ejb3.security.Ejb3AuthenticationInterceptor.invoke(Ejb3AuthenticationInterceptor.java:106)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:46)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:106)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.ejb3.stateless.StatelessContainer.dynamicInvoke(StatelessContainer.java:278)
  |     at org.jboss.aop.Dispatcher.invoke(Dispatcher.java:106)
  |     at 
org.jboss.aspects.remoting.AOPRemotingInvocationHandler.invoke(AOPRemotingInvocationHandler.java:82)
  |     at org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:734)
  |     at 
org.jboss.remoting.transport.socket.ServerThread.processInvocation(ServerThread.java:560)
  |     at 
org.jboss.remoting.transport.socket.ServerThread.dorun(ServerThread.java:369)
  |     at 
org.jboss.remoting.transport.socket.ServerThread.run(ServerThread.java:165)
  | Caused by: java.lang.RuntimeException: java.lang.ExceptionInInitializerError
  |     at 
org.jboss.ejb3.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:174)
  |     at 
org.jboss.ejb3.interceptor.EJB3InterceptorsInterceptor.invoke(EJB3InterceptorsInterceptor.java:63)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.ejb3.entity.TransactionScopedEntityManagerInterceptor.invoke(TransactionScopedEntityManagerInterceptor.java:54)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.ejb3.AllowedOperationsInterceptor.invoke(AllowedOperationsInterceptor.java:47)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:79)
  |     at 
org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:191)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:76)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.ejb3.stateless.StatelessInstanceInterceptor.invoke(StatelessInstanceInterceptor.java:62)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.aspects.security.AuthenticationInterceptor.invoke(AuthenticationInterceptor.java:77)
  |     at 
org.jboss.ejb3.security.Ejb3AuthenticationInterceptor.invoke(Ejb3AuthenticationInterceptor.java:106)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:46)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:106)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.ejb3.stateless.StatelessContainer.dynamicInvoke(StatelessContainer.java:278)
  |     at org.jboss.aop.Dispatcher.invoke(Dispatcher.java:106)
  |     at 
org.jboss.aspects.remoting.AOPRemotingInvocationHandler.invoke(AOPRemotingInvocationHandler.java:82)
  |     at org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:734)
  |     at 
org.jboss.remoting.transport.socket.ServerThread.processInvocation(ServerThread.java:560)
  |     at 
org.jboss.remoting.transport.socket.ServerThread.dorun(ServerThread.java:369)
  |     at 
org.jboss.remoting.transport.socket.ServerThread.run(ServerThread.java:165)
  |     at 
org.jboss.remoting.MicroRemoteClientInvoker.invoke(MicroRemoteClientInvoker.java:163)
  |     at org.jboss.remoting.Client.invoke(Client.java:1550)
  |     at org.jboss.remoting.Client.invoke(Client.java:530)
  |     at 
org.jboss.aspects.remoting.InvokeRemoteInterceptor.invoke(InvokeRemoteInterceptor.java:62)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.aspects.tx.ClientTxPropagationInterceptor.invoke(ClientTxPropagationInterceptor.java:61)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.aspects.security.SecurityClientInterceptor.invoke(SecurityClientInterceptor.java:53)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.ejb3.remoting.IsLocalInterceptor.invoke(IsLocalInterceptor.java:72)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.ejb3.stateless.StatelessRemoteProxy.invoke(StatelessRemoteProxy.java:103)
  |     at $Proxy0.save(Unknown Source)
  |     at com.tungadb.testclient.TestClient.main(TestClient.java:26)
  |     at 
org.jboss.aspects.remoting.InvokeRemoteInterceptor.invoke(InvokeRemoteInterceptor.java:74)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.aspects.tx.ClientTxPropagationInterceptor.invoke(ClientTxPropagationInterceptor.java:61)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.aspects.security.SecurityClientInterceptor.invoke(SecurityClientInterceptor.java:53)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.ejb3.remoting.IsLocalInterceptor.invoke(IsLocalInterceptor.java:72)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.ejb3.stateless.StatelessRemoteProxy.invoke(StatelessRemoteProxy.java:103)
  |     at $Proxy0.save(Unknown Source)
  |     at com.tungadb.testclient.TestClient.main(TestClient.java:26)
  | Caused by: java.lang.ExceptionInInitializerError
  |     at com.tungadb.admin.AdminFacade.save(AdminFacade.java:27)
  |     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  |     at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
  |     at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
  |     at java.lang.reflect.Method.invoke(Unknown Source)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:112)
  |     at 
org.jboss.ejb3.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:166)
  |     at 
org.jboss.ejb3.interceptor.EJB3InterceptorsInterceptor.invoke(EJB3InterceptorsInterceptor.java:63)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.ejb3.entity.TransactionScopedEntityManagerInterceptor.invoke(TransactionScopedEntityManagerInterceptor.java:54)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.ejb3.AllowedOperationsInterceptor.invoke(AllowedOperationsInterceptor.java:47)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:79)
  |     at 
org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:191)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:76)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.ejb3.stateless.StatelessInstanceInterceptor.invoke(StatelessInstanceInterceptor.java:62)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.aspects.security.AuthenticationInterceptor.invoke(AuthenticationInterceptor.java:77)
  |     at 
org.jboss.ejb3.security.Ejb3AuthenticationInterceptor.invoke(Ejb3AuthenticationInterceptor.java:106)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:46)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:106)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.ejb3.stateless.StatelessContainer.dynamicInvoke(StatelessContainer.java:278)
  |     at org.jboss.aop.Dispatcher.invoke(Dispatcher.java:106)
  |     at 
org.jboss.aspects.remoting.AOPRemotingInvocationHandler.invoke(AOPRemotingInvocationHandler.java:82)
  |     at org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:734)
  |     at 
org.jboss.remoting.transport.socket.ServerThread.processInvocation(ServerThread.java:560)
  |     at 
org.jboss.remoting.transport.socket.ServerThread.dorun(ServerThread.java:369)
  |     at 
org.jboss.remoting.transport.socket.ServerThread.run(ServerThread.java:165)
  | Caused by: javax.persistence.PersistenceException: 
org.hibernate.HibernateException: The chosen transaction strategy requires 
access to the JTA TransactionManager
  |     at 
org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:720)
  |     at 
org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:121)
  |     at 
javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:51)
  |     at 
javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:33)
  |     at 
com.tungadb.admin.EntityManagerHelper.<clinit>(EntityManagerHelper.java:20)
  |     ... 34 more
  | Caused by: org.hibernate.HibernateException: The chosen transaction 
strategy requires access to the JTA TransactionManager
  |     at 
org.hibernate.impl.SessionFactoryImpl.<init>(SessionFactoryImpl.java:329)
  |     at 
org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1294)
  |     at 
org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:713)
  |     ... 38 more
  | 

Step 11: do nothing, just try to run the client again, it gets 
java.lang.NoClassDefFoundError
Please look at the stack trace
Exception in thread "main" javax.ejb.EJBException: java.lang.RuntimeException: 
java.lang.NoClassDefFoundError
  |     at 
org.jboss.ejb3.tx.Ejb3TxPolicy.handleExceptionInOurTx(Ejb3TxPolicy.java:63)
  |     at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:83)
  |     at 
org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:191)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:76)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.ejb3.stateless.StatelessInstanceInterceptor.invoke(StatelessInstanceInterceptor.java:62)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.aspects.security.AuthenticationInterceptor.invoke(AuthenticationInterceptor.java:77)
  |     at 
org.jboss.ejb3.security.Ejb3AuthenticationInterceptor.invoke(Ejb3AuthenticationInterceptor.java:106)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:46)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:106)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.ejb3.stateless.StatelessContainer.dynamicInvoke(StatelessContainer.java:278)
  |     at org.jboss.aop.Dispatcher.invoke(Dispatcher.java:106)
  |     at 
org.jboss.aspects.remoting.AOPRemotingInvocationHandler.invoke(AOPRemotingInvocationHandler.java:82)
  |     at org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:734)
  |     at 
org.jboss.remoting.transport.socket.ServerThread.processInvocation(ServerThread.java:560)
  |     at 
org.jboss.remoting.transport.socket.ServerThread.dorun(ServerThread.java:369)
  |     at 
org.jboss.remoting.transport.socket.ServerThread.run(ServerThread.java:165)
  | Caused by: java.lang.RuntimeException: java.lang.NoClassDefFoundError
  |     at 
org.jboss.ejb3.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:174)
  |     at 
org.jboss.ejb3.interceptor.EJB3InterceptorsInterceptor.invoke(EJB3InterceptorsInterceptor.java:63)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.ejb3.entity.TransactionScopedEntityManagerInterceptor.invoke(TransactionScopedEntityManagerInterceptor.java:54)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.ejb3.AllowedOperationsInterceptor.invoke(AllowedOperationsInterceptor.java:47)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:79)
  |     at 
org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:191)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:76)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.ejb3.stateless.StatelessInstanceInterceptor.invoke(StatelessInstanceInterceptor.java:62)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.aspects.security.AuthenticationInterceptor.invoke(AuthenticationInterceptor.java:77)
  |     at 
org.jboss.ejb3.security.Ejb3AuthenticationInterceptor.invoke(Ejb3AuthenticationInterceptor.java:106)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:46)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:106)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.ejb3.stateless.StatelessContainer.dynamicInvoke(StatelessContainer.java:278)
  |     at org.jboss.aop.Dispatcher.invoke(Dispatcher.java:106)
  |     at 
org.jboss.aspects.remoting.AOPRemotingInvocationHandler.invoke(AOPRemotingInvocationHandler.java:82)
  |     at org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:734)
  |     at 
org.jboss.remoting.transport.socket.ServerThread.processInvocation(ServerThread.java:560)
  |     at 
org.jboss.remoting.transport.socket.ServerThread.dorun(ServerThread.java:369)
  |     at 
org.jboss.remoting.transport.socket.ServerThread.run(ServerThread.java:165)
  |     at 
org.jboss.remoting.MicroRemoteClientInvoker.invoke(MicroRemoteClientInvoker.java:163)
  |     at org.jboss.remoting.Client.invoke(Client.java:1550)
  |     at org.jboss.remoting.Client.invoke(Client.java:530)
  |     at 
org.jboss.aspects.remoting.InvokeRemoteInterceptor.invoke(InvokeRemoteInterceptor.java:62)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.aspects.tx.ClientTxPropagationInterceptor.invoke(ClientTxPropagationInterceptor.java:61)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.aspects.security.SecurityClientInterceptor.invoke(SecurityClientInterceptor.java:53)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.ejb3.remoting.IsLocalInterceptor.invoke(IsLocalInterceptor.java:72)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.ejb3.stateless.StatelessRemoteProxy.invoke(StatelessRemoteProxy.java:103)
  |     at $Proxy0.save(Unknown Source)
  |     at com.tungadb.testclient.TestClient.main(TestClient.java:25)
  |     at 
org.jboss.aspects.remoting.InvokeRemoteInterceptor.invoke(InvokeRemoteInterceptor.java:74)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  | 09:34:06,184 DEBUG InvokerRegistry:595 - removed 
SocketClientInvoker[1d86fd3, socket://127.0.0.1:3873] from registry
  | 09:34:06,185 DEBUG MicroSocketClientInvoker:277 - 
SocketClientInvoker[1d86fd3, socket://127.0.0.1:3873] disconnecting ...
  | 09:34:06,186 DEBUG SocketWrapper:123 - 
ClientSocketWrapper[Socket[addr=/127.0.0.1,port=3873,localport=50336].476128] 
closing
  |     at 
org.jboss.aspects.tx.ClientTxPropagationInterceptor.invoke(ClientTxPropagationInterceptor.java:61)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.aspects.security.SecurityClientInterceptor.invoke(SecurityClientInterceptor.java:53)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.ejb3.remoting.IsLocalInterceptor.invoke(IsLocalInterceptor.java:72)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.ejb3.stateless.StatelessRemoteProxy.invoke(StatelessRemoteProxy.java:103)
  |     at $Proxy0.save(Unknown Source)
  |     at com.tungadb.testclient.TestClient.main(TestClient.java:25)
  | Caused by: java.lang.NoClassDefFoundError
  |     at com.tungadb.admin.AdminFacade.save(AdminFacade.java:27)
  |     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  |     at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
  |     at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
  |     at java.lang.reflect.Method.invoke(Unknown Source)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:112)
  |     at 
org.jboss.ejb3.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:166)
  |     at 
org.jboss.ejb3.interceptor.EJB3InterceptorsInterceptor.invoke(EJB3InterceptorsInterceptor.java:63)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.ejb3.entity.TransactionScopedEntityManagerInterceptor.invoke(TransactionScopedEntityManagerInterceptor.java:54)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.ejb3.AllowedOperationsInterceptor.invoke(AllowedOperationsInterceptor.java:47)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:79)
  |     at 
org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:191)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:76)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.ejb3.stateless.StatelessInstanceInterceptor.invoke(StatelessInstanceInterceptor.java:62)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.aspects.security.AuthenticationInterceptor.invoke(AuthenticationInterceptor.java:77)
  |     at 
org.jboss.ejb3.security.Ejb3AuthenticationInterceptor.invoke(Ejb3AuthenticationInterceptor.java:106)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:46)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:106)
  |     at 
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |     at 
org.jboss.ejb3.stateless.StatelessContainer.dynamicInvoke(StatelessContainer.java:278)
  |     at org.jboss.aop.Dispatcher.invoke(Dispatcher.java:106)
  |     at 
org.jboss.aspects.remoting.AOPRemotingInvocationHandler.invoke(AOPRemotingInvocationHandler.java:82)
  |     at org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:734)
  |     at 
org.jboss.remoting.transport.socket.ServerThread.processInvocation(ServerThread.java:560)
  |     at 
org.jboss.remoting.transport.socket.ServerThread.dorun(ServerThread.java:369)
  |     at 
org.jboss.remoting.transport.socket.ServerThread.run(ServerThread.java:165)
  | 

Anyone, please help

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