2gb sd card not recognized

On my computer I have two partions: One with XP and one with Vista Beta 2. Is there an obvious reason besides a driver issue, that my newly purchased 2GB SD card is not seen in Vista, but is threated perfectly in XP. I use a card reader in my computer, and whenever I insert the card in Vista, it tells me that the card is not formatted, and recommend that I do so. It will, however, only format 1GB and not 2. I have other SD cards of different sizes, and it seems that only cards larger than 1GB poses problems to Vista. Anyone else with similar experiences?