Seam 1.2.1 is intended to be used on JBoss 4.0.5. Seam 1.3 is intended to be used on JBoss 4.2.0.GA. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4053661#4053661 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4053661