Do you have the it.aztech.signer.AZTECH_SignerRemoteHome class on the second JBoss from where you are looking up the bean? In general, you should have the remote/local and remote-home/local-home interfaces in the classpath of the client which is invoking the EJBs (in this case, the client is the second ear, so you should package those interfaces with this second ear) View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4081322#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...