I've seen a couple posts regarding this type of error but their resolutions haven't solved our issue though. We're testing our install using a very simple example EJB. The client looks like this (not complete code):
// preparing properties for constructing an InitialContext object
Properties properties = new Properties();
properties.put(Context.INITIAL_CONTEXT_FACTORY, "org.jnp.interfaces.NamingContextFactory");
properties.put(Context.PROVIDER_URL, "jnp://69.57.141.196:1099");
try {
// Get an initial context
InitialContext jndiContext = new InitialContext(properties);
System.out.println("Got context");
// Get a reference to the Bean
Object ref = jndiContext.lookup("StringProcessor");
System.out.println("Got reference");
// Get a reference from this to the Bean's Home interface
StringProcessorHome home = (StringProcessorHome)
PortableRemoteObject.narrow (ref, StringProcessorHome.class);
System.out.println("Got home");
// Create an Adder object from the Home interface
StringProcessor sp = home.create();