i just performed a fresh install of windows xp on an asus a6r and everything works fine except for the fact that the cd drive is not detected by windows. i've tried the regedit fix which involves deleting the upper and lower filters in the registry key but those keys do not exist. the cd drive does not show up in device manager, however, the driver for sm bus controller is not installed. is this due to a chipset driver problem or what? any help would be greatly appreciated.