Won't recognize CD Drive

Some times Ubuntu 10.04 will recognize my CD drive, but most times it doesn't. I can't seem to duplicate the problem consistently, except this morning where I can't get it to read the damn thing at all.

sudo lshw -C disk; sudo lshw -C drive; cat /etc/fstab produces:

*-disk
       description: ATA Disk
       product: SAMSUNG HM320II
       physical id: 0
       bus info: scsi@0:0.0.0
       logical name: /dev/sda
       version: 2AC1
       serial: S1YRJ9AZ102228
       size: 298GiB (320GB)
       capabilities: partitioned partitioned:dos
       configuration: ansiversion=5 signature=e7e8e0a0
  *-cdrom
       description: DVD-RAM writer
       product: CDDVDW TS-L633M
       vendor: hp
       physical id: 1
       bus info: scsi@1:0.0.0
       logical name: /dev/cdrom
       logical name: /dev/cdrw
       logical name: /dev/dvd
       logical name: /dev/dvdrw
       logical name: /dev/scd0
       logical name: /dev/sr0
       version: 0301
       capabilities: removable audio cd-r cd-rw dvd dvd-r dvd-ram
       configuration: ansiversion=5 status=nodisc
# /etc/fstab: static file system information.
#
# Use 'blkid -o value -s UUID' to print the universally unique identifier
# for a device; this may be used with UUID= as a more robust way to name
# devices that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point> <type> <options> <dump> <pass>
proc /proc proc defaults 0 0
# / was on /dev/sda1 during installation
UUID=3e22d5a8-0fd6-4334-a8c4-54d7d7a86204 / ext4 errors=remount-ro 0 1
# swap was on /dev/sda5 during installation
UUID=e6be766b-2d1f-46c8-be7b-4ab079b95d43 none swap sw 0 0
/dev/scd0 /media/cdrom0 udf,iso9660 user,noauto,exec,utf8 0 0

Newbie, so the more explicit the instructions the better. Everything else seems to work peachy.