Hi, this seems to be the reason for the error: Cause: Class 'entity.util.JsfCrudELResolver' is not an instance of 'class javax.el.ELResolver' So, maybe there are more java standard libraries included in your project which confuse JBoss. I assume that you use NetBeans in a wrong way, because it should automatically add the server provided libraries to your classpath without deploying them. Could you take a look at e.g. this tutorial: http://www.netbeans.org/kb/55/ejb30-jboss.html#Exercise_1 ? I hope it provides you with more info. Best regards Wolfgang View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4252783#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...