Dvd's dont work!!!

[Mr.Texan]

Hi all, Im backing up some of my dvd's but I cant make them play. I use dvddecryptor and dvdshrink. After that I use Roxio 6 to burn. I use the Creator Classic then burn as Data. Ive tried Nero 6 but I dant have a plugin for it. Ive burned about 10 dvd's in total. They only work on my PC and a NEW cheap dvd player. My two other dvd players cant read them(one being a DVD burner home player the other a 400 dvd system) The only backups that my dvd players can read were made by dvdxcopy express. Those read like a charm! So, what am I doing wrong!!!!????? Please help. Im guessing its the burning process. Thnks to everyone who helps!!!