You have to rip the DVD in a different way if you're backing up dual layered DVD's. Go to Mode and then File. Make sure that all of the files are selected, choose where you want to create the image and then Decrypt.
When it has finished you can open up Instant Copy. Ensure that the source drive is the Hard Disc and the destination drive is your Burner and click start. You then browse to where you created the image and open the VIDEO_TS file which will open the image in Instant Copy.
I prefer to use this method as you can chosse what tracks to keep i.e. extras, trailers etc. Have play around with it for a while and familiarise yourself with it's options.
Remember: The more extras, trailers, audio tracks etc. you get rid of, the more space you will have available for the main movie. I burn discs with all the extras that are relative to the movie.
Send me your Email address and I'll send you something