The map disks are backups yeah, and I would think its a bad burn as well, but they worked perfectly fine before, untill I accidently pressed the eject button, at which point each time I tried to put it in, it would say read error. The other dvd I had on hand was a dvd with divx movies on it, which worked with absolutely no issues.
I would understand if it didn't read dvds or other disks, but just the map disks? I'm very confused. I have made fresh copies with no luck, same deal.