Hi! I have the same problem and I couldnt get things working. When I typecast the object returned by the lookup (a Proxy), I get ClassCastException and I really don't understand why. The callByValue is set true. And, the only place where my interfaces are is in the ejb-jar which is deployed inside an ear file. I also have a ejb-client jar with only the interfaces and it is located at server/default/lib so JBoss can load the interfaces. What am I doing wrong? Thanks View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3968219#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...