DVD to Xbox360 (WMV) issue

Trying to take a DVD on my HDD and convert it to WMV for Xbox360. I am using and I simply give it the Source directory for the DVD on my HDD and a target directory on my HDD. I select ‘Start’ and get this (would be nice if i could cut and paste from the processing text):

WMV Convert begin…
Task_1 failed! Erorr=4(501 18 -1072886856 502 1)
Process completed successfully!

Tried 4 other DVD’s same result.