Based on your examples, it looks like JBoss files are found but your own files are not. Is that true?
Have you read Section 9. "Remote classloading facility" of the Remoting Guide (http://docs.jboss.org/jbossremoting/2.5.2.SP3/html/) carefully?
You might need to configure the Remoting EJB3 connector with the classloader associated with your EAR.
-Ron