Problems fast forwarding burned nero 7 ulta dvds

This is a minor issue but I have a external lite on that came with a nero 6. Recently I upgraded to nero 7 ultra. Now when I playback my burned dvd to my dvd player I notice that when I fast forward at anything more 2x the speed the dvd freezes then returns to the original menu. I never had this issue when I used my nero 6. I use to be able to fast forwarda burned dvd at 8x the speed, the maximum of my dvd player.
Except for this everything else seems to work fine. I tried changing the speed in the nero vision 4 just before burning. First I made sure that the write settings were on max. When that didn't work I tried setting the write speed to 8x. Still no change. Is this some glitch with nero 7 ultra or has my setting been some how changed when I upgraded?

Are you still using the same media? Try changing to a different make of blank media and don't always assume that setting the write speed to max is a good idea!