DVDs not being mounted/read

[civint]

I have a slight problem with an install of linux mint 3.1, and it is this: My DVD-rom drive has a tendancy to not read dvds, claiming that thee is no media inserted when I attempt to mount it from the 'computer' menu with this message

Cannot mount volume.
Invalid mount option when attempting to mount the volume 'LXFDVD99'.

I tried it using the 'mount' command in the command line, with this result

mount: can't find cdrom0 in /etc/fstab or /etc/mtab

my /etc/fstab file looks like this:

# /etc/fstab: static file system information.
#
# <file system> <mount point> <type> <options> <dump> <pass>
proc /proc proc defaults 0 0
# /dev/sda1
UUID=b975a006-cd4c-4a0d-a782-535557d77783 / ext3 defaults,errors=remount-ro 0 1
# /dev/sda2
UUID=ba6f14ae-658b-495e-9cbb-469ef5a4f3b1 /home ext3 defaults 0 2
# /dev/sda3
UUID=f26fa4a0-f4c5-4ac9-9c4b-ff4b68fdbc82 none swap sw 0 0
/dev/scd0 /media/cdrom0 udf,iso9660 user,noauto 0 0
/dev/scd1 /media/cdrom1 udf,iso9660 user,noauto 0 0

and my /etc/mtab looks like this

/dev/sda1 / ext3 rw,errors=remount-ro 0 0
proc /proc proc rw,noexec,nosuid,nodev 0 0
/sys /sys sysfs rw,noexec,nosuid,nodev 0 0
varrun /var/run tmpfs rw,noexec,nosuid,nodev,mode=0755 0 0
varlock /var/lock tmpfs rw,noexec,nosuid,nodev,mode=1777 0 0
procbususb /proc/bus/usb usbfs rw 0 0
udev /dev tmpfs rw,mode=0755 0 0
devshm /dev/shm tmpfs rw 0 0
devpts /dev/pts devpts rw,gid=5,mode=620 0 0
lrm /lib/modules/2.6.20-15-generic/volatile tmpfs rw 0 0
/dev/sda2 /home ext3 rw 0 0
binfmt_misc /proc/sys/fs/binfmt_misc binfmt_misc rw 0 0
fusesmb /home/civint/Network fuse rw,nosuid,nodev,allow_other,max_read=32768 0 0
/dev/sdb1 /media/sdb1 vfat rw,iocharset=utf8,umask=000 0 0
/dev/scd0 /media/cdrom0 iso9660 ro,noexec,nosuid,nodev,user=john 0 0

any help anyone?
civ

[Husse]

The problem is actually the opposite to the error message
You don't mount a DVD or CD drive, you mount the media in it (goes for floppys to)
You actually have cdrom0 in mtab (a file you don't edit) which I think is because you have removed a disc without unmounting first which confuses the system.

So if you insert the disc you did nor unmount/eject in Mint and right click the icon and select unmout or eject whichever is displayed (seems to vary) it probably will be ok.
Remember that in the terminal the command umount with no n before the m