Problem with GUIMachine

Hi!

I have installed the GUIMachine on the portal server. The installation went pretty smoothly, but while trying to access it now - it comes up with the initial logo screen, loads all the classes and then comes up with the error - No GUI machine server exists at the address specified.

I am on IE6 SP1 (as comes up in the About screen). Any ideas about what is going wrong.

Regards,