Win2k IPX and Games

[HF6]

Hello all, I am having problems with the IPX protocol on Win2k. I have 2 comps at home networked through a 3com hub. The tcp/ip protocol works fine but not all my games can use this. The ipx is fine for connecting , transfering files, etc. and will even see the host game, but will not complete the connection. The games in particular are Delta Force 1 and 2. There are no settings in the game to tinker with and both versions are the same. I have the latest drivers for all our hardware and am at a loss. The systems are both home built. One is a P3 550 with 128 MB Cas 3 ram and a SMC network card 10/100. The other is a P3 667 with 128 MB Cas 3 ram and a 3 com 10/100 card. We can play Quake 3 and AvP fine with the TCP/IP connection but as stated not all my games use this. I would like to sort this out with the IPX if I can. If you need more info I can provide it and appreciate any help you can give.