I am using jBPM 3.2.2 on Weblogic 9.2.3. jBPM internally use hibernate. I have the follwoing config and the datasource is accessable from the container. The hibernate3.jar is also in the classpath. Is there any suggestions about what could be the cause and how to fix it? I did search but did not find any clue.

<!-- hibernate dialect -->
<property name="hibernate.dialect">org.hibernate.dialect.Oracle9Dialect</property>

<!-- JDBC connection properties (begin) ===
<property name="hibernate.connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
<property name="hibernate.connection.url">jdbc:oracle:thin:@localhost:1521:xe</property>
<property name="hibernate.connection.username">myName</property>
<property name="hibernate.connection.password">myPass</property>
==== JDBC connection properties (end) -->

<property name="hibernate.cache.provider_class">org.hibernate.cache.HashtableCacheProvider</property>

<!-- DataSource properties (begin) -->
<property name="hibernate.connection.datasource">java:/comp/env/jdbc/JbpmDS</property>
<!-- DataSource properties (end) -->

<!-- JTA transaction properties (begin) -->
<property name="hibernate.transaction.factory_class">org.hibernate.transaction.JTATransactionFactory</property>
<property name="hibernate.transaction.manager_lookup_class">org.hibernate.transaction.WebLogicTransactionManagerLookup</property>
<!-- JTA transaction properties (end) -->

Here is the error I got:

org.hibernate.HibernateException: Could not instantiate TransactionManagerLookup
at org.hibernate.transaction.TransactionManagerLookupFactory.getTransactionManagerLookup(TransactionManagerLookupFactory.java:47)
at org.hibernate.cfg.SettingsFactory.createTransactionManagerLookup(SettingsFactory.java:418)
at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:140)
at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2009)http://money.cnn.com/?cnn=yes
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1292)
at org.jbpm.persistence.db.DbPersistenceServiceFactory.getSessionFactory(DbPersistenceServiceFactory.java:91)
at org.jbpm.persistence.db.DbPersistenceService.getSessionFactory(DbPersistenceService.java:95)
at org.jbpm.persistence.db.DbPersistenceService.getSession(DbPersistenceService.java:99)
at org.jbpm.persistence.db.DbPersistenceService.getGraphSession(DbPersistenceService.java:341)
at org.jbpm.JbpmContext.getGraphSession(JbpmContext.java:571)
at org.jbpm.JbpmContext.newProcessInstance(JbpmContext.java:408)
at org.jbpm.command.NewProcessInstanceCommand.execute(NewProcessInstanceCommand.java:74)
at org.jbpm.ejb.impl.CommandServiceBean.execute(CommandServiceBean.java:90)
at org.jbpm.ejb.impl.CommandServiceBean_jdfmx8_EOImpl.execute(CommandServiceBean_jdfmx8_EOImpl.java:60)
at org.jbpm.ejb.impl.CommandServiceBean_jdfmx8_EOImpl_WLSkel.invoke(Unknown Source)
at weblogic.rmi.internal.ServerRequest.sendReceive(ServerRequest.java:174)
at weblogic.rmi.cluster.ClusterableRemoteRef.invoke(ClusterableRemoteRef.java:335)
at weblogic.rmi.cluster.ClusterableRemoteRef.invoke(ClusterableRemoteRef.java:252)
at org.jbpm.ejb.impl.CommandServiceBean_jdfmx8_EOImpl_923_WLStub.execute(Unknown Source)
at com.pbsg.mst.wf.WFStarterMDB.onMessage(WFStarterMDB.java:48)
at weblogic.ejb.container.internal.MDListener.execute(MDListener.java:429)
at weblogic.ejb.container.internal.MDListener.transactionalOnMessage(MDListener.java:335)
at weblogic.ejb.container.internal.MDListener.onMessage(MDListener.java:291)
at com.ibm.mq.jms.MQMessageConsumer.receiveAsyncQ(MQMessageConsumer.java:2431)
at com.ibm.mq.jms.MQMessageConsumer.receiveAsync(MQMessageConsumer.java:3816)
at com.ibm.mq.jms.SessionAsyncHelper.run(SessionAsyncHelper.java:420)
at java.lang.Thread.run(Thread.java:595)