MS Broadband Network MN-820

I have 2 PC's and a notebook networked together using
Microsoft Broadband Network MN-820 Wireless-G Kit.

I have Links LS 1999 installed on all 3 computers along
with latest DirectX.

I can't get the game to play. I can get the computers
connected through the game, and even chat back and forth,
but when I try to 'start' the game from the host PC the
connected PC's stop communicating.

Do I need to configure ports on the base station? I
tested Direct Play and it seems to be functioning normal.

Links documentation doesn't mention what ports the game
uses. Tried using TCP/IP and modem connections. Same
result either way.

Any network geniuses out there?