I'm not sure if this is correct or not, but i try different ports. Most people seem to use the basic 1624-26 or 80. try different numbers. One of them is bound to work.
1612 works for me.

Hey admin... Just a question, would there be a way for you guys to implement a "random port" program, so the game can just drill through or automatically select a port that would work? Just a thought.