yet another question about port forwarding with games/apps

I have tried persisent and application port forwarding;
also tried virtual DMZ. For an example I will use the
game Battlefield 1942. None of the aforementioned things
worked. I have come on here and spent hours looking at
newsgroup stuff and faqs and I have tried a lot, now I am
getting frustrated. Can anyone help me as to how to game
online again and actually use a p2p program again, thanks.

I have the MN-730 adapter card with a MN-700 gateway.