I have a Liteon lightscribe external dvd burner. the model is DX-20A3H05C. It burned like the first ten movies I backed up fine on Verbatim DVD+R 16X dvd's but it just stopped all of a sudden saying illegal disk in. So i tried burning one on a DVD+RW non lightscribe disk and it worked. Why would it not work with my lightscribe DVD's anymore? The DVD+RW was 4X. Any held would be appreciated. Thanks.