Try the following.......... It works for the ATMEL AT76C502AR WIRELESS LAN. Drivers are for Win98 & WinXP.
Download the PW-2100 driver (not pw2100e). You might also want to try the utility also.
Go Here.Other info for you: There are a lot of wireless cards based on the Atmel MAC; Some other Atmel cards are the Belkin F5D060 V.2, SMC 2632WV.2 and V.3, and I think the MS card. If the above drivers don't work, try one of these.
Hope this info helps. Good Luck!
BIOYAM.