Ejb in JDeveloper

Question

i was trying to do small application in ejb 3.0
i am using oracle JDeveloper.
i created one entity bean named First.java and created interfaces as FirstEJBLocal and FirstEJBRemote. and i was created FirstEJBBean as bean class. then i created FirstEJBClient to run this application
I kept all under a same package named ejbfirst.
while compiling all it doesn't throws any error.
but while running
Context jndiContext =getInitialContext();
Object ref = jndiContext.lookup("FirstEJBBean");
FirstEJBLocal fstif =(FirstEJBLocal)PortableRemoteObject.narrow(ref,FirstEJBLocal.class);
it didn't execute and exited from the application
then i used debug option to find an error
the error was in the line,
Object ref = jndiContext.lookup("FirstEJBBean");
what is the problem in this

Answer 1

Thank you Mr.Frank
Thank you for your response
I found what was an issue.
I didn't create an Application Server Connection.
while Testing the connection it threw an error message as
Error while getting remote MBeanServer for url: ormi://localhost:23791/default:
Error reading application-client descriptor: Error communicating with server: Connection refused: connect; nested exception is:
     javax.naming.CommunicationException: Connection refused: connect [Root exception is java.net.ConnectException: Connection refused: connect]
Can you help me to create a connection