im having some trouble with a .avi file im tring to put on a dvd! im using nero 7 premier Edition when i play the file in windows media player it plays great and everything is in sync! but when iv made the menu etc. and burnt it onto a dvd-r the sound is about 3 seconds behind the video! can anyone tell me how to resolve this? iv burnt things with nero 7 before and its always been fine! how come this time?