If you use internal DVD with builtin or internal video player, you can't just going directly from Video to DVD or other way. You have to go to one of the music player first (audio, sat ratio, tv .... ).
I have it working if you click from VIDEO and directly to DVD and otherway around. PM me your email addy so I can send the file over to test.
After I get this thing out, I'll move to work on the auto iG's Guidance screen.