Finally found out what the problem is-->SOAP.
The old setting is based on jbossws4ee but now JBoss 4.2.3 used jbossws. Without touching the war file, I tried to downgrade back to jbossws4ee but when I started JBoss, I got a message say "Could not create deployment:....Caused by: java.lang.ClassNotFoundException: No ClassLoaders found for: org.jboss.webservice.WebServiceClientDeployment
" Anyone which jar file is this class located? Thanks in advance.