My simple client that accesses a simple EJB3 app includes client/jbossall-client.jar and client/log4j.jar. Of course, the manifest in jbossall-client.jar includes almost all of the JARs in the client directory. (If you were coming from 4.x I would point out that jbossall-client.jar doesn't include anything, and that you need the entire client directory for use with your client app, but you are coming from 5.0.1, so you should already know that. But it sure does sound as if you didn't provide the entire client directory to your app...) View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4246234#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...