DVD reading problems

[Dario Meloni]

I am having some problems  reading dvds with both totem and vlc with breezy.

VLC returns:
VLC media player 0.8.2 Janus
libdvdnav: Using dvdnav version 0.1.9 from http://dvd.sf.net
libdvdread: Encrypted DVD support unavailable.
libdvdread: Can't stat /dev/dvd
No such file or directory
libdvdnav: vm: faild to open/read the DVD
libdvdread: Can't stat /dev/dvd
No such file or directory
[00000262] dvdread demuxer error: DVDRead cannot open source: /dev/dvd
[00000261] main input error: no suitable access module for `dvd:///dev/dvd'
[00000254] main playlist: nothing to play

and Totem:
libdvdread: Encrypted DVD support unavailable.


what should I do?