You need jboss-aop.jar on your classpath. See userguide for exact details of what you need on the client classpath. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4109065#4109065 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4109065