It's on the server side. org.jboss.jms.client.ClientAOPStackLoader will download it and install it on the client side. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4216326#4216326 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=4216326