when I deploy cmp bean on jboss-3.2.2 it gives following error (I use lomboz 
plugins):-

5:53:11,197 INFO  [EjbModule] Deploying FirstStat
15:53:11,728 WARN  [EntityContainer] No resource manager found for jdbc/MySqlDs
15:53:13,320 ERROR [EntityContainer] Starting failed
org.jboss.deployment.DeploymentException: Error in jbosscmp-jdbc.xml : 
datasource-mapping MYSQL not found
        at 
org.jboss.ejb.plugins.cmp.jdbc.metadata.JDBCEntityMetaData.(JDBCEntityMetaData.java:433)
        at 
org.jboss.ejb.plugins.cmp.jdbc.metadata.JDBCApplicationMetaData.(JDBCApplicationMetaData.java:310)

Note:- Stateless or stateful bean created with dao, accessing of database 
normally.
------------------------------------------
FirstStatBean.class
------------------------------------------
/*
 * Created on Jan 23, 2006
 *
 * TODO To change the template for this generated file go to
 * Window - Preferences - Java - Code Style - Code Templates
 */
package chaman.com;

import java.rmi.RemoteException;

import javax.ejb.EJBException;
import javax.ejb.EntityBean;
import javax.ejb.EntityContext;

/**
 *
 * <!-- begin-user-doc --> You can insert your documentation for 
'FirstcmpBean'. <!-- end-user-doc --> *
 <!--  begin-lomboz-definition -->
 <?xml version="1.0" encoding="UTF-8"?>
 <lomboz:EJB xmlns:j2ee="http://java.sun.com/xml/ns/j2ee"; 
xmlns:lomboz="http://lomboz.objectlearn.com/xml/lomboz";>
 <lomboz:entity>
 <lomboz:entityEjb>
 <j2ee:display-name>Firstcmp</j2ee:display-name>
 <j2ee:ejb-name>Firstcmp</j2ee:ejb-name>
 <j2ee:ejb-class>chaman.com.FirstcmpBean</j2ee:ejb-class>
 <j2ee:persistence-type>Container</j2ee:persistence-type>
 <j2ee:prim-key-class>java.lang.Integer</j2ee:prim-key-class>
 <j2ee:cmp-version>2.x</j2ee:cmp-version>
 <j2ee:abstract-schema-name>ecr</j2ee:abstract-schema-name>
 <j2ee:primkey-field>id</j2ee:primkey-field>
 </lomboz:entityEjb>
 <lomboz:fieldMappings>
 <lomboz:fieldName>id</lomboz:fieldName>
 <lomboz:fieldType>java.lang.Integer</lomboz:fieldType>
 <lomboz:columnName>id</lomboz:columnName>
 <lomboz:jdbcType>VARCHAR</lomboz:jdbcType>
 <lomboz:sqlType>INT</lomboz:sqlType>
 <lomboz:readOnly>false</lomboz:readOnly>
 <lomboz:primaryKey>true</lomboz:primaryKey>
 </lomboz:fieldMappings>
 <lomboz:fieldMappings>
 <lomboz:fieldName>fname</lomboz:fieldName>
 <lomboz:fieldType>java.lang.String</lomboz:fieldType>
 <lomboz:columnName>fname</lomboz:columnName>
 <lomboz:jdbcType>VARCHAR</lomboz:jdbcType>
 <lomboz:sqlType>VARCHAR</lomboz:sqlType>
 <lomboz:readOnly>false</lomboz:readOnly>
 <lomboz:primaryKey>false</lomboz:primaryKey>
 </lomboz:fieldMappings>
 <lomboz:fieldMappings>
 <lomboz:fieldName>lname</lomboz:fieldName>
 <lomboz:fieldType>java.lang.String</lomboz:fieldType>
 <lomboz:columnName>lname</lomboz:columnName>
 <lomboz:jdbcType>VARCHAR</lomboz:jdbcType>
 <lomboz:sqlType>VARCHAR</lomboz:sqlType>
 <lomboz:readOnly>false</lomboz:readOnly>
 <lomboz:primaryKey>false</lomboz:primaryKey>
 </lomboz:fieldMappings>
 <lomboz:fieldMappings>
 <lomboz:fieldName>phone</lomboz:fieldName>
 <lomboz:fieldType>java.lang.String</lomboz:fieldType>
 <lomboz:columnName>phone</lomboz:columnName>
 <lomboz:jdbcType>VARCHAR</lomboz:jdbcType>
 <lomboz:sqlType>VARCHAR</lomboz:sqlType>
 <lomboz:readOnly>false</lomboz:readOnly>
 <lomboz:primaryKey>false</lomboz:primaryKey>
 </lomboz:fieldMappings>
 <lomboz:tableName>address</lomboz:tableName>
 <lomboz:dataSourceName></lomboz:dataSourceName>
 </lomboz:entity>
 </lomboz:EJB>
 <!--  end-lomboz-definition -->
 *
 * <!-- begin-xdoclet-definition -->
 * @ejb.bean name="Firstcmp"
 *      jndi-name="Firstcmp"
 *      type="CMP"
 *  primkey-field="id" 
 *  schema="ecr" 
 *  cmp-version="2.x"
 *  data-source=""
 * 
 *  @ejb.persistence 
 *   table-name="address" 
 * 
 * @ejb.finder 
 *    query="SELECT OBJECT(a) FROM ecr as a"  
 *    signature="java.util.Collection findAll()"  
 *
 * @ejb.pk class="java.lang.Integer"
 * @ejb.resource-ref res-ref-name="jdbc/MySqlDs"
 *  res-auth="Container"
 * @jbos.resource-ref res-ref-name="jdbc/MySqlDs"
 *   jndi-name="java:/MySqlDS"
 * <!-- end-xdoclet-definition -->
 * @generated
 **/
public abstract class FirstcmpBean implements javax.ejb.EntityBean {
 protected EntityContext eContext;
 
  /**
   *
   * <!-- begin-user-doc -->
   * The  ejbCreate method.
   * <!-- end-user-doc -->
   *
   * <!-- begin-xdoclet-definition --> 
   * @ejb.create-method 
   * <!-- end-xdoclet-definition --> 
   * @generated
   */
  public java.lang.Integer ejbCreate(Integer id, String fname,String lname, 
String phone ) throws javax.ejb.CreateException {
    // EJB 2.0 spec says return null for CMP ejbCreate methods.
    // TODO: YOU MUST INITIALIZE THE FIELDS FOR THE BEAN HERE. 
    // setMyField("Something"); 
    // begin-user-code
        setId(id);
        setFname(fname);
        setLname(lname);
        setPhone(phone);
        
    return null;
    // end-user-code
  }

  /**
   * <!-- begin-user-doc -->
   * The container invokes this method immediately after it calls ejbCreate.
   * <!-- end-user-doc -->
   * 
   * @generated
   */
  public void ejbPostCreate(Integer id, String fname,String lname, String 
phone) throws javax.ejb.CreateException {
    // begin-user-code
    // end-user-code
  }

  /**
   *
   *
   * <!-- begin-user-doc -->
   * CMP Field id
   *
   * Returns the id
   * @return the id
   * 
   * <!-- end-user-doc -->
   *
   * <!-- begin-xdoclet-definition --> 
   *
   * @ejb.persistent-field 
   * @ejb.persistence
   *    column-name="id"
   *     jdbc-type="VARCHAR"
   *     sql-type="INT"
   *     read-only="false"
   * @ejb.pk-field 
   *
   * @ejb.interface-method
   * 
   * <!-- end-xdoclet-definition --> 
   * @generated
   */
  public abstract java.lang.Integer getId();

  /**
   * <!-- begin-user-doc -->
   * Sets the id
   * 
   * @param java.lang.Integer the new id value
   * <!-- end-user-doc -->
   * 
   * <!-- begin-xdoclet-definition --> 
   * @ejb.interface-method
   * <!-- end-xdoclet-definition -->
   * @generated 
   */
  public abstract void setId(java.lang.Integer id);

  /**
   *
   *
   * <!-- begin-user-doc -->
   * CMP Field fname
   *
   * Returns the fname
   * @return the fname
   * 
   * <!-- end-user-doc -->
   *
   * <!-- begin-xdoclet-definition --> 
   *
   * @ejb.persistent-field 
   * @ejb.persistence
   *    column-name="fname"
   *     jdbc-type="VARCHAR"
   *     sql-type="VARCHAR"
   *     read-only="false"
   *  
   *
   * @ejb.interface-method
   * 
   * <!-- end-xdoclet-definition --> 
   * @generated
   */
  public abstract java.lang.String getFname();

  /**
   * <!-- begin-user-doc -->
   * Sets the fname
   * 
   * @param java.lang.String the new fname value
   * <!-- end-user-doc -->
   * 
   * <!-- begin-xdoclet-definition --> 
   * @ejb.interface-method
   * <!-- end-xdoclet-definition -->
   * @generated 
   */
  public abstract void setFname(java.lang.String fname);

  /**
   *
   *
   * <!-- begin-user-doc -->
   * CMP Field lname
   *
   * Returns the lname
   * @return the lname
   * 
   * <!-- end-user-doc -->
   *
   * <!-- begin-xdoclet-definition --> 
   *
   * @ejb.persistent-field 
   * @ejb.persistence
   *    column-name="lname"
   *     jdbc-type="VARCHAR"
   *     sql-type="VARCHAR"
   *     read-only="false"
   *  
   *
   * @ejb.interface-method
   * 
   * <!-- end-xdoclet-definition --> 
   * @generated
   */
  public abstract java.lang.String getLname();

  /**
   * <!-- begin-user-doc -->
   * Sets the lname
   * 
   * @param java.lang.String the new lname value
   * <!-- end-user-doc -->
   * 
   * <!-- begin-xdoclet-definition --> 
   * @ejb.interface-method
   * <!-- end-xdoclet-definition -->
   * @generated 
   */
  public abstract void setLname(java.lang.String lname);

  /**
   *
   *
   * <!-- begin-user-doc -->
   * CMP Field phone
   *
   * Returns the phone
   * @return the phone
   * 
   * <!-- end-user-doc -->
   *
   * <!-- begin-xdoclet-definition --> 
   *
   * @ejb.persistent-field 
   * @ejb.persistence
   *    column-name="phone"
   *     jdbc-type="VARCHAR"
   *     sql-type="VARCHAR"
   *     read-only="false"
   *  
   *
   * @ejb.interface-method
   * 
   * <!-- end-xdoclet-definition --> 
   * @generated
   */
  public abstract java.lang.String getPhone();

  /**
   * <!-- begin-user-doc -->
   * Sets the phone
   * 
   * @param java.lang.String the new phone value
   * <!-- end-user-doc -->
   * 
   * <!-- begin-xdoclet-definition --> 
   * @ejb.interface-method
   * <!-- end-xdoclet-definition -->
   * @generated 
   */
  public abstract void setPhone(java.lang.String phone);

        /* (non-Javadoc)
         * @see javax.ejb.EntityBean#setEntityContext(javax.ejb.EntityContext)
         */
        public void setEntityContext(EntityContext arg0) throws EJBException,
                        RemoteException {
                // TODO Auto-generated method stub
         this.eContext= arg0;
        }
        /* (non-Javadoc)
         * @see javax.ejb.EntityBean#unsetEntityContext()
         */
        public void unsetEntityContext() throws EJBException, RemoteException {
                // TODO Auto-generated method stub
        this.eContext=null;
        }
}
---------------------------------------------------
jbosscmp-jdbc.class
--------------------------------------------------
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE jbosscmp-jdbc PUBLIC "-//JBoss//DTD JBOSSCMP-JDBC 3.0//EN" 
"http://www.jboss.org/j2ee/dtd/jbosscmp-jdbc_3_0.dtd";>

<jbosscmp-jdbc>
   
     java:/MySqlDS
     <datasource-mapping>MYSQL</datasource-mapping>
     <preferred-relation-mapping>foreign-key</preferred-relation-mapping>
   

   <enterprise-beans>

     <!--
       To add beans that you have deployment descriptor info for, add
       a file to your XDoclet merge directory called jbosscmp-jdbc-beans.xml
       that contains the  markup for those beans.
     -->

      
         <ejb-name>Firstcmp</ejb-name>

         <table-name>address</table-name>

         <cmp-field>
            <field-name>id</field-name>
            <column-name>id</column-name>

            <jdbc-type>VARCHAR</jdbc-type>
            <sql-type>INT</sql-type>

        </cmp-field>
         <cmp-field>
            <field-name>fname</field-name>
            <column-name>fname</column-name>

            <jdbc-type>VARCHAR</jdbc-type>
            <sql-type>VARCHAR</sql-type>

        </cmp-field>
         <cmp-field>
            <field-name>lname</field-name>
            <column-name>lname</column-name>

            <jdbc-type>VARCHAR</jdbc-type>
            <sql-type>VARCHAR</sql-type>

        </cmp-field>
         <cmp-field>
            <field-name>phone</field-name>
            <column-name>phone</column-name>

            <jdbc-type>VARCHAR</jdbc-type>
            <sql-type>VARCHAR</sql-type>

        </cmp-field>

      

   </enterprise-beans>

</jbosscmp-jdbc>


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