hi! i develop 2 EJB's one in JBoss 4 and other in JBoss 3. my main app. do this:

what i need is to add the class org.jnp.interfaces.NamingContextFactory into the InitialContext. this is because i need use different jbossall-client.

urls[0] = new File ("C:\\jbossall-client.jar").toURL ();
URLClassLoader urlcl = new URLClassLoader (urls);
Class c= urlcl.loadClass ("org.jnp.interfaces.NamingContextFactory");

Hashtable<String, Object> env2 = new Hashtable<String, Object>();
env2.put ("org.jnp.interfaces.NamingContextFactory",c.newInstance ());
env2.put(Context.INITIAL_CONTEXT_FACTORY,"org.jnp.interfaces.NamingContextFactory");
env2.put(Context.URL_PKG_PREFIXES,"org.jboss.naming org.jnp.interfaces");
env2.put(Context.PROVIDER_URL,"localhost");

InitialContext ctx2 = new InitialContext(env2);

i also tried to bind the object. but didn't work

InitialContext ctx2 = new InitialContext(env2);
ctx2.rebind ("org.jnp.interfaces.NamingContextFactory",c.newInstance ());

both methods showme this exception:
javax.naming.NoInitialContextException: Cannot instantiate class: org.jnp.interfaces.NamingContextFactory [Root exception is java.lang.ClassNotFoundException: org.jnp.interfaces.NamingContextFactory]
at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:657)
at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:247)
at javax.naming.InitialContext.init(InitialContext.java:223)
at javax.naming.InitialContext.(InitialContext.java:197)