OS 10.5 - Burning a DVD with m2v & aif file on Toast 7 & 9

Hey,

I'm trying to burn my short film onto a DVD. I have a m2v file along with aif for audio. I don't want to convert and compress for fear of losing quality. I've burned similar files before but for some odd reason when I burn it on Toast 7 or 9 now, the DVD is getting burned but when I play the DVD only the image of the audio file gets displayed and the music plays. I can't see the video. However, if I click on the 'Title' button on the DVD player.......presto........the video appears along with the video. This is really puzzling me. I've already tried it 4 times! Can someone please suggest how I can make it work so when anyone inserts the DVD, one just has to click on the icon and the movie plays. This should be the normal method. Please help!