OK, the Verb disc is fine.
I do not use DvdSanta, but it sounds like the audio in not correct DVD format.
Get GSpot (free), load one of VOB files in and see what it say about audio type.
It could also be a burning problem. Get ImgBurn (very good and free/ donation only). Use that to burn new DVD, just find VIDEO_TS folder and load it in, burn.