oh, my mistake! thx for pointing at the spot and for your help, jaikiran. really appreciate it. i finally decide to deploy both version (jboss-5.1.0.GA for jdk5 and jdk 6) for testing purposes. both version runs well. | 2009-10-07 15:28:28,838 INFO [org.apache.coyote.http11.Http11Protocol] (main) Initializing Coyote HTTP/1.1 on http-0.0.0.0-8080 | ---deleted--- | 2009-10-07 15:29:12,486 INFO [org.jboss.bootstrap.microcontainer.ServerImpl] (main) JBoss (Microcontainer) [5.1.0.GA (build: SVNTag=JBoss_5_1_0_GA date=200905221634)] Started in 1m:26s:247ms | -- singgih octafianto View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4259108#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...