I'm unsure if Roxio includes DVD player software so run VLCPLAYER and open that DVD.
I do read from Roxio "Play back all Hollywood DVD-ROM titles with CinePlayer" so see what Cineplayer and VLCPLAYER thinks of your DVD.
I burned a DVd using Roxio mydvd premier 8, everything went fine until it came time to play the disc, the computer kept reading it as a blank disc, and I i tried to burn the project with the same disc, it said it couldn't be done. I then went to roxio, and went to disc information it said, that the movie was burned, but it wouldn't read. I don't know exactly what it said, but it wasn't good, what should i do i've had the same problem with nero, dell, the computer's brand , even replaced the dvd writer, still the same thing happened, is it the software?