At quick look: You have @PersistenceContext(unitName = "empmstEntityManager") atop your entity bean.. This is used to inject the EM into the underlying field. To make your Entity become a part of the EM, ensure its packaged into its own JAR (along with the other Entity beans) with a persistence.xml in the root-level META-INF directory. Give a try? This is the mechanism I use, according to: http://docs.jboss.org/ejb3/app-server/tutorial/packaging/packaging.html S, ALR View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4066322#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...