Could you be a little more specific than 'seems not to like'?
I'm not sure what your goal is.
If you have a DVD Pro project, couldn't you just rebuild another disc from that? Or, since the original will also be a DVD5, why not just copy it to the hard drive and burn it from there using your burning software of choice? There won't be any of the content scrambling found on commercial titles. In fact, copying a DVD that was created by you in the first place should be as easy as it gets!