Strange Problem when Converting DVD to Zen

I have a Creative Zen:M. When I try to use DVDFab Platnium 3.1.3.2 to convert the main movie of a DVD to play on the Zen, I only get about 66% to 75% of the movie converted. No error, no fault, the program acts as if the conversion was a success. I generally use fixed bitrate and 2-pass (with no obvious restrictions on file size).

Has anyone else had a movie just not completely convert? Is there a workaround for this?