Your EAR packaging still does not look right. You have created a new folder named "APP-INF" and placed the jar in the subfolder "lib" under APP-INF. JBoss does not recognize this "APP-INF" folder. Please read through my earlier reply again to see how the packaging should look like. anonymous wrote : Caused by: org.jboss.xb.binding.JBossXBRuntimeException: class-loading not found as a child of jboss-app I guess, you did something wrong in the jboss-app.xml. Please post its contents. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4174809#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...