Also, try to remove the hibernate jars from Jboss default library if you are having hibernate jars in ur ear.. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4203395#4203395 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4203395