Audio + Video Not "Sync'ed" Up

[Jiglet]

I've been working on this "power hour" DVD for the past few months and I have 60 music video clips one after another, each one minute long. I put them all together into one big MPG file and after creating a menu and all that I burnt it to DVD using DVDLab-Pro. When I watch it on my DVD player at about halfway through the video (over 30 minutes) it becomes noticable that the audio and video are not synced together, the picture doesn't match up with the sound. I burnt another version of this earlier with 6 MPG files, ten videos in each, and on that version this problem is not present, however I need to do it this way as one large MPG file because I plan on having several of these on one MPG. Is there any way to re-encode the MPG or burn it using a different program that will ensure that the audio and video will be properly synced together? Any help would be greatly appreciated - Thanks alot!

[Jiglet]

Was this posted in the wrong forum or something? I looked but couldn't find any helpful information on the topic.