Ok i fixed the problem. If you work with seam, u need to copy the jboss-seam*.jar in the lib-Folder of the server. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4210332#4210332 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=4210332