What version of JBoss AS are you using? Did you compile your web service using the JARs from that same version? View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4239515#4239515 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=4239515