Intermittent wireless after Windows 2003 dcpromo

Hello,

Could anyone point me to any possible causes for my wireless network
(infrastructure mode) becoming intermittent after running dcpromo on my
Windows 2003 server? Access between my 2 XP machines is still fine, it's
only when connecting (via Terminal Services) to the 2003 server. Pinging
the server gets around 50% replies. I have a Belkin 11mbps wireless card in
the server, Buffalo 11mbps pcmcia cards in the laptops and a Netgear 802.11g
wireless access point.

Any ideas or thoughts would be appreciated.
Thanks.