Hello! I searched all over the net and didn't find an answer to my question. 
Here is my problem: I created a datasource for a, let's say, unusual 
database... It's a db called Pervasive.SQL (V8). I also put an entry for this 
db (with the type mappings and stuff) in the standardjbosscmp-jdbc.xml. This 
wasn't easy, 'cause there's not enough documentation for this db. Well, when I 
tried it out with a few CMP Entities, it worked fine. But when I tried to 
migrate an existing project to this datasource I had some trouble (that wasn't 
there with PostgreSQL, the db I was using before). Here's what I get when I try 
to deploy the EJBs:

"JBoss 4" wrote : 14:42:54,625 ERROR [EntityContainer] Starting failed 
jboss.j2ee:jndiName=Produto,service=EJB
  | java.lang.NullPointerException
  |     at 
org.jboss.ejb.plugins.cmp.jdbc.JDBCTypeFactory.createTypeSimple(JDBCTypeFactory.java:492)
  |     at 
org.jboss.ejb.plugins.cmp.jdbc.JDBCTypeFactory.getJDBCType(JDBCTypeFactory.java:457)
  |     at 
org.jboss.ejb.plugins.cmp.jdbc.bridge.JDBCAbstractCMPFieldBridge.(JDBCAbstractCMPFieldBridge.java:83)
  |     at 
org.jboss.ejb.plugins.cmp.jdbc.bridge.JDBCCMP2xFieldBridge.(JDBCCMP2xFieldBridge.java:56)
  |     at 
org.jboss.ejb.plugins.cmp.jdbc.bridge.JDBCEntityBridge.createCMPField(JDBCEntityBridge.java:1112)
  |     at 
org.jboss.ejb.plugins.cmp.jdbc.bridge.JDBCEntityBridge.loadCMPFields(JDBCEntityBridge.java:943)
  |     at 
org.jboss.ejb.plugins.cmp.jdbc.bridge.JDBCEntityBridge.init(JDBCEntityBridge.java:148)
  |     at 
org.jboss.ejb.plugins.cmp.jdbc.JDBCStoreManager.initStoreManager(JDBCStoreManager.java:420)
  |     at 
org.jboss.ejb.plugins.cmp.jdbc.JDBCStoreManager.start(JDBCStoreManager.java:353)
  |     at 
org.jboss.ejb.plugins.CMPPersistenceManager.start(CMPPersistenceManager.java:157)
  |     at org.jboss.ejb.EntityContainer.startService(EntityContainer.java:340)
  |     at 
org.jboss.system.ServiceMBeanSupport.jbossInternalStart(ServiceMBeanSupport.java:271)
  |     at 
org.jboss.system.ServiceMBeanSupport.jbossInternalLifecycle(ServiceMBeanSupport.java:221)
  |     at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)
  |     at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |     at java.lang.reflect.Method.invoke(Method.java:324)
  |     at 
org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:141)
  |     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:80)
  |     at org.jboss.mx.server.Invocation.invoke(Invocation.java:72)
  |     at 
org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:242)
  |     at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:642)
  |     at 
org.jboss.system.ServiceController$ServiceProxy.invoke(ServiceController.java:891)
  |     at $Proxy0.start(Unknown Source)
  |     at org.jboss.system.ServiceController.start(ServiceController.java:416)
  |     at sun.reflect.GeneratedMethodAccessor6.invoke(Unknown Source)
  |     at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |     at java.lang.reflect.Method.invoke(Method.java:324)
  |     at 
org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:141)
  |     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:80)
  |     at org.jboss.mx.server.Invocation.invoke(Invocation.java:72)
  |     at 
org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:242)
  |     at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:642)
  |     at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:176)
  |     at $Proxy46.start(Unknown Source)
  |     at org.jboss.ejb.EjbModule.startService(EjbModule.java:394)
  |     at 
org.jboss.system.ServiceMBeanSupport.jbossInternalStart(ServiceMBeanSupport.java:271)
  |     at 
org.jboss.system.ServiceMBeanSupport.jbossInternalLifecycle(ServiceMBeanSupport.java:221)
  |     at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)
  |     at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |     at java.lang.reflect.Method.invoke(Method.java:324)
  |     at 
org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:141)
  |     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:80)
  |     at org.jboss.mx.server.Invocation.invoke(Invocation.java:72)
  |     at 
org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:242)
  |     at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:642)
  |     at 
org.jboss.system.ServiceController$ServiceProxy.invoke(ServiceController.java:891)
  |     at $Proxy0.start(Unknown Source)
  |     at org.jboss.system.ServiceController.start(ServiceController.java:416)
  |     at sun.reflect.GeneratedMethodAccessor6.invoke(Unknown Source)
  |     at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |     at java.lang.reflect.Method.invoke(Method.java:324)
  |     at 
org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:141)
  |     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:80)
  |     at org.jboss.mx.server.Invocation.invoke(Invocation.java:72)
  |     at 
org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:242)
  |     at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:642)
  |     at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:176)
  |     at $Proxy19.start(Unknown Source)
  |     at org.jboss.ejb.EJBDeployer.start(EJBDeployer.java:605)
  |     at org.jboss.deployment.MainDeployer.start(MainDeployer.java:935)
  |     at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:746)
  |     at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:709)
  |     at sun.reflect.GeneratedMethodAccessor30.invoke(Unknown Source)
  |     at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |     at java.lang.reflect.Method.invoke(Method.java:324)
  |     at 
org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:141)
  |     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:80)
  |     at 
org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:119)
  |     at org.jboss.mx.server.Invocation.invoke(Invocation.java:74)
  |     at 
org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:131)
  |     at org.jboss.mx.server.Invocation.invoke(Invocation.java:74)
  |     at 
org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:242)
  |     at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:642)
  |     at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:176)
  |     at $Proxy8.deploy(Unknown Source)
  |     at 
org.jboss.deployment.scanner.URLDeploymentScanner.deploy(URLDeploymentScanner.java:305)
  |     at 
org.jboss.deployment.scanner.URLDeploymentScanner.scan(URLDeploymentScanner.java:481)
  |     at 
org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.doScan(AbstractDeploymentScanner.java:204)
  |     at 
org.jboss.deployment.scanner.AbstractDeploymentScanner.startService(AbstractDeploymentScanner.java:277)
  |     at 
org.jboss.system.ServiceMBeanSupport.jbossInternalStart(ServiceMBeanSupport.java:271)
  |     at 
org.jboss.system.ServiceMBeanSupport.jbossInternalLifecycle(ServiceMBeanSupport.java:221)
  |     at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)
  |     at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |     at java.lang.reflect.Method.invoke(Method.java:324)
  |     at 
org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:141)
  |     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:80)
  |     at org.jboss.mx.server.Invocation.invoke(Invocation.java:72)
  |     at 
org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:242)
  |     at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:642)
  |     at 
org.jboss.system.ServiceController$ServiceProxy.invoke(ServiceController.java:891)
  |     at $Proxy0.start(Unknown Source)
  |     at org.jboss.system.ServiceController.start(ServiceController.java:416)
  |     at sun.reflect.GeneratedMethodAccessor6.invoke(Unknown Source)
  |     at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |     at java.lang.reflect.Method.invoke(Method.java:324)
  |     at 
org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:141)
  |     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:80)
  |     at org.jboss.mx.server.Invocation.invoke(Invocation.java:72)
  |     at 
org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:242)
  |     at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:642)
  |     at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:176)
  |     at $Proxy4.start(Unknown Source)
  |     at org.jboss.deployment.SARDeployer.start(SARDeployer.java:261)
  |     at org.jboss.deployment.MainDeployer.start(MainDeployer.java:935)
  |     at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:746)
  |     at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:709)
  |     at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:693)
  |     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  |     at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
  |     at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |     at java.lang.reflect.Method.invoke(Method.java:324)
  |     at 
org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:141)
  |     at org.jboss.mx.server.Invocation.dispatch(Invocation.java:80)
  |     at 
org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:119)
  |     at org.jboss.mx.server.Invocation.invoke(Invocation.java:74)
  |     at 
org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:131)
  |     at org.jboss.mx.server.Invocation.invoke(Invocation.java:74)
  |     at 
org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:242)
  |     at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:642)
  |     at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:176)
  |     at $Proxy5.deploy(Unknown Source)
  |     at org.jboss.system.server.ServerImpl.doStart(ServerImpl.java:396)
  |     at org.jboss.system.server.ServerImpl.start(ServerImpl.java:293)
  |     at org.jboss.Main.boot(Main.java:151)
  |     at org.jboss.Main$1.run(Main.java:405)
  |     at java.lang.Thread.run(Thread.java:534)

Can somebody help me? If needed, I can post the xml files that I created/edited.

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