I just got this DVD burner. Having problems getting a DVD to play. I updated the NERO software with all the uppadtes at that website. At first the DVD wouldn't play at all. Now it will play but starts and stops, choppy may describe the condition. It plays 1 second of movie while the sound plays then skips ahead to catch up with sound then plays one more second of movie all while paused for about 2 seconds. Can anyone suggest some ideas?