The file jboss-saaj.jar must be copied from \\jboss-4.2.3.GA\lib to \\jboss-4.2.3.GA\lib\endorsed. Problem solved. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4238492#4238492 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=4238492