For those interested, this problem was solved by making sure jboss-app.xml (see below) was in META-INF of the .ear file. I had been tinkering with the build.xml file and had inadvertently removed the code necessary to copy this to the .ear. Earnie! <jboss-app> | <app-name>WAITC</app-name> | <loader-repository> | org.ebsinc.waitnc:loader=WAITnCLoader | <loader-repository-config> | java2ParentDelegation=false | </loader-repository-config> | </loader-repository> | </jboss-app> View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4106856#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...