Forget this post. It was my fault (I was using @PersistenceContext instead SMPC by accident), now it is working fine. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4046999#4046999 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4046999