Ok, I get it work finally. Problem was solved removing most part of jbossws jars (leave there only jbossws-wsconsume-impl.jar and jaxb-xjc.jar that stay in client dir in the server). I putted all jars inside the ear because it is the suggested way for seam apps and simplify distribution and deploy. Sincerely I didn't understand what happened to classLoader in hot deploying jbossws' jars. Thanks a lot for the interest. I think our generic client based on wsConsumer will be released in few days. Thanks for your help. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4024698#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...