Hello, Create the jar file with the following structure. <package1>/<class files> <package2>/<class files> .. META-INF/ejb-jar.xml META-INF/jboss.xml In your case the jar file structure, day05/SignOn.java day05/SignOnHome.java day05/SignOnEJB.java day05/InvalidLoginException.java META-INF/ejb-jar.xml META-INF/jboss.xml Hope this might solve your problem. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3959069#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...