I have the following transaction settings in my hibernate.cfg.xml:

<property name="hibernate.current_session_context_class">jta</property>
<property name="hibernate.transaction.factory_class">org.hibernate.transaction.JTATransactionFactory</property>
<property name="hibernate.transaction.manager_lookup_class">org.hibernate.transaction.JBossTransactionManagerLookup</property>
<property name="jta.UserTransaction">java:comp/UserTransaction</property>


While calling beginTransaction, I get the following exception:

17:55:13,474 ERROR [HibernateUtil] Building SessionFactory failed.
java.lang.ClassCastException: org.jboss.tm.TxManager
at org.hibernate.transaction.JNDITransactionManagerLookup.getTransactionManager(JNDITransactionManagerLookup.java:23)
at org.hibernate.impl.SessionFactoryImpl.<init>(SessionFactoryImpl.java:302)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1176)

I am running my web application in JBoss4.0


Any idea why I am getting such an exception??

Thanks in advance
Merin