Hi Ed, thanks for helping. I think that the file is not found or used because of the logs : No TransactionManagerLookup configured although i have those lines in my config file : <!-- JTA transaction properties (begin) --> <property name=hibernate.transaction.factory_class>org.hibernate.transaction.JTATransactionFactory <property name=hibernate.transaction.manager_lookup_class>org.hibernate.transaction.JBossTransactionManagerLookup <!-- JTA transaction properties (end) --> I'm using a oracle database with jboss (i failed to make it running on weblogic :( ) I found a way to make the exception disappear (i add a <property name=com.arjuna.ats.jta.allowMultipleLastResources value=TRUE> in jbossjta-properties.xml but i believe its not the solution for long run) Regards, O.M. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4069955#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...