I've had this dvd burner for almost 2 weeks now. Been working great recently, and just started to have troubles tonight. I rented Resident Evil: Apocalypse and Troy and it doesn't load up at all. Tried other DVD's and it loaded up fine on to PowerDVD. I went into Windows Explorer and it doesn't show anything there either. Any ideas? The model # is GSA-4163B-BK. Thanks.