Addeding the serial compatable libraries to the classpath is not an option since the client is jboss 4.0.3. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4192290#4192290 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4192290