I've tried it and it should work but it doesn't :( . There is a bug that incorrectly generates the wrong path to the jar file. I hope they fix this soon. I do however have a workaround. You can use the class property to list all the persistence classes that you want to have available in the persistence manager. Example: | ... | <jta-data-source>java:/MyDS</jta-data-source> | <class>yPackage.User</class> | <class>yPackage.SomeOtherEntity</class> | <properties> | ... | It isn't really nice, but it works. I tested it. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3967196#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...