Wpa Supplicant on Win XP with SP 2

Dear All, Iam using Windows XP with service Pack 2 with D-Link USB client DWL-G122 When I use windows as my suplicant, I do not get all the optioons supported by my AP. But In case I RightClick on the wireless connection in the Network connections, and goto properties-- > Wireless Network tab and uncheck option Use windows to configure my wireless network settings, then my D-Link Utility pops up with gives me all the options ex: PEAP with MD5 (windows gives me only PEAP with MSCHAPv2 option only) Is there anyone who has faced the same and resolved it. Does windows need a patch etc? Pl help. Warm regards Queenie