Thanks for your help. We just noticed we have a few jsf components that directly cooperate with myfaces components. In this case, we have to stick to myfaces. I've spent a whole trying to get our app working with Jboss4.2+Seam1.3CVSBuild+MyFaces1.1.5+Tomahawk1.1.5, but with no luck. Maybe myfaces is not truly jsf 1.2 compatible. Our site will go alive in a few weeks time. I guess the only solution is to wait until myfaces group releases a new version that is compatible with Seam1.3. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4050646#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...