Underdog Audio Sync

Hi all. I’m new to DVDFab and the forum. I’ve been impressed by DVDFab and the great support. However, I have an issue with the audio leading the video by about 600mS when backing up the movie Underdog to mobile / AVI. Previously, I had a similar problem with Ratatouille, but version appears to have solved that one. I have tried but I am still experiencing the audio sync problem with Underdog. Any suggestions are welcome. Thanks.