dvd back up

[cooper]

Hi

can anyone help i am trying to backup dvd films i have a dvd pioneer dvd rewriter. i use the dvd decrypter program and it saves the dvd to my hard drive but when i copy the dvd files to disk it dont run? i think the disk is not closing how do i get the disks to close.the dvd copys o.k the files are all there on the disk but it dont boot up.i am using nero burn and record now max.can someone let me know want settings to use.

thanks

cooper