hello do u know this site? http://www.stardeveloper.com/articles/?id=0009 i finish.... but it maked jboss2.4 Ichange jboss 3.0 and same jsp same jarfile after depoly/....... nulll pointer exception do u know how to development jsp use by jboss 3.0? i think tomcat/webinfo/root/..../lib jar file(I copy 2.4) change...... plz tell me