Hi there,
1- This is a review thread, people should ask for help in a new thread
2- After making 1 coaster, people should use DVD+RW / DVD-RW media for further testing, I would not make 10 coasters.
3- Always provide full conversion log and/or burn logs when asking for help. There is a lot of information in there.
4- I have a feeling you created PAL DVDs when you need NTSC. Is this the case ?