Hello I need to use MyFaces with Seam 2.0 on JBoss 4.2.2. Libraries myfaces-api-1.1.5.jar and myfaces-imp-1.1.5.jar I have in war in my application web-inf/lib. I removed the JSF impl from /deploy/jboss-web.deployer/jsf-libs and comment listeners in /deploy/jboss-web.deployer/conf/web.xml (http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4105235#...) So I have error 12:42:17,546 WARN [JspServlet] Failed to load engineOptionsClass java.lang.reflect.InvocationTargetException at sun.reflect.GeneratedConstructorAccessor47.newInstance(Unknown Source) ... Caused by: java.lang.NoClassDefFoundError: org/jboss/web/jsf/integration/config/JBossJSFConfigureListener Where should I search a solution? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4111586#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...