I did follow the instruction. my enviroment: Jboss JEMS 1.2 CR1 (AS 4.0.5.GA, EJB3 1.0.0.CR9-jboss4.0.5, Portal 2.4.0.GA, JBossWS 1.0.3.SP1 Installer) I downloaded jbossws 1.0.4 and I did: 1.) Copy lib/jbossws-client.jar to $JBOSS_HOME/client/ 2.) Unzip lib/jbossws.sar to $JBOSS_HOME/server/default/deploy/ 3.) replace the jboss-xml-binding.jar in the $JBOSS_HOME/client and $JBOSS_HOME/lib. (got it from http://repository.jboss.com/jboss/jbossxb/1.0.0.CR7) Once I've done everything, I can't even start jboss anymore because clearly jboss depend on the old version of jboss-xml-binding.jar. I've tried many times and I'm sure I did everything right. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4017626#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...