My Simpletech CF reader sometimes does not detect my CF card in XP

[Gundam]

I didn't have this problem in 2k, and only noticed it in XP. My Simpletech Compact Flash Reader will sometimes read my Kingston 128mb card, and at other times it'll show nothing inside the drive. I don't think its the media, because it's not a generic brand, and it seems to read fine when i have it in my camera.