Java EE (Java Enterprise Edition) General Discussion

What can i do in this situation? (I use Sun Application Server 8.1) :
In this piece of code in a ejb test client:

Hashtable env = new Hashtable();
env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.cosnaming.CNCtxFactory");
env.put(Context.PROVIDER_URL, "iiop://127.0.0.1:4700");
 //get naming context
Context context = new InitialContext(env);
 //look up jndi name
 Object ref = context.lookup("JNDIName");

I have an error in a lookup, and i tried ejb/JNDIName, java:comp/env/ejb/JNDIName but ... the error is in all situations:

javax.naming.NameNotFoundException [Root exception is org.omg.CosNaming.NamingContextPackage.NotFound: IDL:omg.org/CosNaming/NamingContext/NotFound:1.0]

at com.sun.jndi.cosnaming.ExceptionMapper.mapException(ExceptionMapper.java:44)

at com.sun.jndi.cosnaming.CNCtx.callResolve(CNCtx.java:453)

at com.sun.jndi.cosnaming.CNCtx.lookup(CNCtx.java:492)-- Failed initializing bean access.

Thanks