Hi, I also experience the same thing. I try to run JBoss 4.2.0GA on JDK 1.5.0_12 with "all" configuration. Does anyone has find the root cause ? I try to run it on my friend's computer, it runs perfectly fine. I can not tell what is wrong. I compared the dlls(version) with my friend's, it's the same. The only difference is my friend run the JBoss with JDK 1.5.0_03, which I think should not make any difference (or maybe I'm wrong?) Regards, Ferry View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4071115#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...