Looks like a problem with my prev reply in terms of display so sending it again. The applicaiton.xml indirectly references the util jar by pointing to the lib directory where the util.jar is kept. <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE application PUBLIC "-//Sun Microsystems, Inc.//DTD J2EE Application 1.3//EN" "http://java.sun.com/dtd/application_1_3.dtd"> <display-name>ejbSession</display-name> EjbSession.jar <library-directory>lib</library-directory> The util.jar is kept under lib directory and am getting a class not found exception View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4130613#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...