Hi Dark X,
I checked out D-link's website. They have a beta driver for Vista, but they do not say whether it is for x32 or x64 Vista. I must assume it is probably for x32. You can try and see. Did Vista assign a generic driver for it that worked at setup?
http://www.dlink.com/products/support.asp?pid=471&sec=0#drivers
I could not find any reference for x64 drivers anywhere on the net for it. It may only be compatible with x32 Vista for now.
Hope the link's driver works for you,
Shawn