Hello all, and particularly Angela123!
Going on my own experiences, I've always used my DVD-drive and directly extracted content into PD, thus avoiding the need to fiddle with the VOB file contents*. It seems there are some file compatibility problems that might arise from the TV station using am Apple Mac-based disc authoring software, as well as SteveK's suggestion that copyright-protection may have been embedded into the disc. A combination of these factors may be hampering your attempts to extract the disc comtents for your own use, Angela.
*In relation to VOB files(folders containing portions of the videos in MPEG2 file type), I've toyed about with these and found that, while I can load them into Power Director, stringing the files together to reconstruct the video isn't as straight-forward as it might appear. If a VOB file has, for example three portions of the total video, and there may be three such folders on the disc, each containing three portions, as you join the portions together, you'll notice a "jump" from one portion to the next, particularly noticable if a portion comes to its end in the middle of an action, like opening a gate into a garden, for instance, there might be a displaced frame so when you add the next portion, the gate swing might be further advanced(a sudden jolt) or the last frame of one portion might be repeated as the first frame on the next portion, this can be fixed in PD14 by snipping off the surplus frame.
But all that to one side, If the disc is home-burn or a commercial disc that had no copy-protection embedded, it's just a matter of dropping it into my DVD drive, opening PD, selecting the appropriate mode in the capture window and the entire video comes in without any hiccups unless it's a long freature film whose total file size may go beyond 4 gigabytes, then, the remaining few minutes will show up as a separate capture which I have to join on to the rest to complete the video. There you have it, my experience of extracting disc content into Power Director.
Cheers!
Neil.