Appendix: I have tried my sourcecode (recompiling my SampleInvocationHandler with using of JBoss 4.0.5 jboss-remoting.jar package) with JBoss 4.0.5GA and the error is still the same. Therefore I think it must be something wrong with my code. Is there an example (something without an ant script) that i can deploy? Thanks again. Thomas (gottad) View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4052734#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...