I solved it! Because IIS is v6 (in w2k3), so it needs to add the dll as a Web Service Extension View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4084290#4084290 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4084290