This issue was solved: I add the following statement into the persistence.xml in order.jar: <jar-file>../EatOutEJB3auth.jar</jar-file> The content like following: <?xml version="1.0" encoding="UTF-8"?> <persistence-unit name="EatOutDS"> <jta-data-source>java:/EatOutDS</jta-data-source> <jar-file>../EatOutEJB3auth.jar</jar-file> </persistence-unit> View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3981212#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...