apeape

I bought an internal usb card reader few day ago and inserted to usb port 3 of my gigabyte GA-MA78GPM-DS2H 780G mainboard in windows vista enviroment.But i cant see my internal card reader drive in "Computer". When i check it from device manager, it said that this is a unknown device. But it is no problem in xp enviroment. How can i solve the problem in vista enviroment? Thanks!