Can't Copy DVD on ubuntu 10.04



can’t copy any CD/DVD on Nero linux 4…when i use nero express and i try to copy whole cd/dvd i get this message: failure in the recording process

  • ubuntu-restricted-extras;
  • cdrdao;
  • cdtool;
  • dvd+rw-tools;
  • libdvdread4;
  • libdvdcss2.

those packages are allready instaled

P.S: the disks are not copyrighted or protected and yes i can burn files to cd/dvd. I can copy a whole cd or dvd.