Sorry, can't remember of it; moreover as you said, setting the username/pwd into the stub should not cause this. If migrating to a more recent jboss application server and ws stack is not affordable for you, in order to understand what's happening I would suggest you to capture the soap messages being exchanged. This way you might see what is really changing and that could drive you to understand where is the problem. If you still think there's a bug, you can nevertheless create a minimal application reproducing the problem and attach it to a new jira issue, however keep in mind that the team is putting his main effort into the jaxws development, thus your potential issue might have to be handled by the community. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4094953#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...