Are you sure you are pointing to the same jbossall-client.jar that is available on the AS5 server? View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4231457#4231457 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=4231457