Seam 2.0 requires JSF 1.2. So that's why you get the "no grammar found" error with JSF 1.1. The faces-config.xml in Seam 2.0 is using http://java.sun.com/xml/ns/javaee/web-facesconfig_1_2.xsd, which JSF 1.1 does not understand. I don't know if Seam 2.0 is known to work with MyFaces 1.2 or not. You should check the Seam forum for that. As for fckeditor / fck-faces, I'd suggest that you get rid of that as soon as possible. Whoever wrote it used direct dependencies on MyFaces 1.1 implementation code (very bad idea). It probably doesn't even work with MyFaces 1.2. Stan View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4114376#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...