Audio get out of sync more as the show progresses

[ssgtwg]

I have been trying to convert a mpeg to and avi using autoGK with he divx codec. I have also used the xivd codec. Auto GK is the latest full and bata release. The mpeg has perfect audio. When I convert to avi using any codec (even tried 3vix) the audio on the show (Keen Eddie) starts off fine and in sync. However as the show progresses the audio becomes more and more out of sync unitl there is 2 or more seconds between audio and the character talking. I have tried to adjust using virtualdubmod (latest version) but this only effect the fisrt part of the show and makes the rest of the show out od sync more so than before. I would like to convert this to divx any ideas on why this is coding like this and how to fix same? Thanks

[redwudz]

PAL to NTSC or the reverse? That's one way to have that problem.