You could try mounting the cd manually by:
Making a dir in the /mnt folder (if there isn't already one there)
Now mount the cd from /dev/hdx where x is the location of your cd drive.
If your cd drive is the primary master is would be /dev/hda but this is usually your hdd unless you are using sata or scsi.
It would most likely be /dev/hdc or maybee /dev/hdb, but try them all until one works.
Code:
mount /dev/hdx /mnt/cdrom -t iso9660
Good luck.