DVD Files to Zune WMV

Everytime I convert dvd movie files to Zune the sound keeps cutting off every now and then. I have zune 80gb with Dvdfab Platinum, 20fps, 192 kbps, 180 volume. Thanks in advance

HP DV9000t, Core Dou 2.0 GHZ, 2gb ram, 256 video ram.
Zune 80GB, 2.3 firmware version.
DVDfab Platinum lastest version.