Welcome to the forum!
1. Your discs are pure garbage, search for "cmc mag" using the search function and you'll see why I said that.
2. I don't recognize your error, but someone else may that comes along later in the day. If you have any other programs, such as AnyDVD or some such running in the background, shut it off since they interfere with ImgBurn and are not useful with it.
3. ImgBurn works well with Vista as far as we have been able to tell so I would start the elimination processs with trying the burn on Verbatim DataLifePlus discs or Taiyo Yuden...these are the only manufacturers that we respect around here.
4. If your problem persists, and anytime you need help, please post the full logfile that ImgBurn generates; there is a lot of info there and it saves us trying to use our crystal balls to figure out what happened...