Problem with DVD Santa

When I am converting XVids to dvd using dvd santa for certain films dvd santa says an error has occured and the the programme must close although i can watch them on my computer. Can anyone advise me?

I’m guessing that these are files you have downloaded. If so, then they could be in a variety of formats. It could have to do with the video file type, the audio file type, or the file could simply be corrupted.