Exception: Need to specify class name in environment or system property: java.naming.factory.initial

Question

When i run a JMS related application, i am encountering the following exception error.

javax.naming.NoInitialContextException: Need to specify class name in environment or system property, or as an applet parameter, or in an application resource file: java.naming.factory.initial

We are using Sun Application Server 9.1

Any idea what are we missing?

I already tried adding the following but result still the same

    Properties env = new Properties();
    env.put("java.naming.factory.initial","com.sun.jndi.cosnaming.CNCtxFactory");

    Context ctx = new InitialContext(env);