Liteon SOHW-1633s dvd burn problem!



For some odd reason when i try to burn some dvd using nero or imgburn, it had a hard time with the lead in and the finilizing of the dvd which makes the dvd unable to verify. I have updated to the latest firmware and using officedepot dvds which i never had a problem till now. I can still burn cds without a problem. I want to know is my drive is dying or is it the medias? anyway i can fix this?