Liteon 1653 Firm CSOC can't read dvd-rw?

my liteon 1633 flashed to 1653 CSOC can not read ritek w04 dvd-rw after its burnt ???
i burnt it at 4x and after that drive itself can not read it?
why? any suggestions?

tyr yreburing the DVD-RW. Maybe the drive screwed up somewhere.