trying to access some data discs someone gave me at work, a momnet after I insert a CD this is the message I get:

Code:
DBus error org.freedesktop.DBus.Error.NoReply: Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken.

fstab contents:

# /etc/fstab: static file system information.
#
# <file system> <mount point> <type> <options> <dump> <pass>
proc /proc proc defaults 0 0
# /dev/sdb5
UUID=ac91f103-9f50-49dd-af49-f2960a66e31a / ext3 relatime,errors=remount-ro 0 1
# /dev/sda1
UUID=AEDC22C9DC228C21 /media/XP ntfs defaults,umask=007,gid=46 0 1
# /dev/sda5
UUID=401E-B464 /media/backup_1 vfat utf8,umask=007,gid=46 0 1
# /dev/sdb6
UUID=909D-7724 /media/backup_2 vfat utf8,umask=007,gid=46 0 1
# /dev/sdb7
UUID=fe4e5cf6-7d61-4a9f-942a-ade5c59a6c4d none swap sw 0 0
/dev/scd0 /media/cdrom0 udf,iso9660 user,noauto,exec,utf8 0 0



help?