I copy and ripped dvds using dvdcrypter and dvdshrinker. I used nero 5.5. The brand name of discs are optimum and i don't know the other brand but is the website www.americal.com. I have 10 of dvd-r that came from americal.com that will play and other 20 either play then stop right away or error message on player about region setting. What am i doing wrong and what do i to fix it. the discs are for general 4.7gb dvd-r.