What happens if you copy "jboss-seam-ui.jar" from Seam root to WEB-INF/lib of the registration web app? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4003046#4003046 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4003046