Test this:
Open a terminal.
Run it:
sudo -i
nano /etc/fstab
Check the file you have to cd/dvd drive these options:
/dev/scd0 /media/cdrom0 udf,cdfs,iso9660 user,auto,exec,utf8 0 0
Control + O, save file. Control + X, close nano.
Close a terminal.
In addition
Go to a file manager window ---- You click on somewhere in Places ---- Go to Edit ---- Preferences ---- Media ----- Tick the box for Browse media when inserted.
And
Goto System ---- Adminstration ---- Users and Groups ---- Add the current user to haldaemon.