I recently assembled a new comp and decided to use the Optiarc AD7170A as my sole dvd drive. The drive reads cd's/dvd's fine; however, it is not buring anything whatsoever. When I inserted a blank CD-R, it recognises the disc but cannot open it, saying invalid function. Windows does not even give me the option of putting files onto the drive. Does anyone have any ideas on what could be causing this problem???? Thanks.