Java APIs

I'm not sure if this is the best place to post this but RMI and Corba are close so why not.
I'm looking for a simple solution to this problem...

I am running a CORBA client server architecture between two OS's namely windows XP and rh8.0 (linux)

Arguments:
1. When I start the server on the linux machine and try connect to it from the windows XP machine it will not work.

2. When I start the server on the windows XP machine and try connect to it from the linux machine it connects fine.

3. When I start the server on the windows XP machine and try connect from a windows machine it connects fine.

4. When i start the server on the linux machine and try connect to it from the linux machine it connects fine.

The windows client ORB code is as follows:

Properties props = new Properties();
props.setProperty("org.omg.CORBA.ORBInitialHost", ""+args[0]);
props.setProperty("org.omg.CORBA.ORBInitialPort", ""+args[1]);
ORB orb = ORB.init(orbArgs, props);

Where args[0] = the linux server address
and args[1] = the linux server port

No matter what I try I cannot get the windows client to communicate with the linux server.
Have there been any previously documented cases of this?

Thanks