JBM 1.0.x series doesn't support clustering. You might want to try 1.2.x. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4021008#4021008 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4021008