JSF1.2 support was added in tomcat 6. If I'm not mistaken, JBoss >= 4.2.0 is tomcat 6 based. So you should try upgrading to at least 4.2 if you want to use JSF 1.2.
Hope it helps. aj1m wrote: > i tried many server like tomcat 5 and jboss 4.0.5.GA but i always get error. > and i dont know how it can support or not JSF 1.2 (JSP2.1) >

