Help: i've stuffed up and now have a cdwriter error

tried to mount my cdwriter with mount /cdrom and got an error back mount: /dev/scd0: unknown device I have /cdrom directory with drwxr-xr-x 2 root root have in /etc/fstab /dev/scd0 /cdrom auto ro,noauto,user,exec 0 0 have in /dev lrwxrwxrwx 1 root root 9 june 18:14 cdrom -> /dev/scd0 and brw-r--r-- 1 root disk 11, 0 jan 19 19:36 scd0 (in yellow) has anyone any idea what i've done wrong. Yes i've been fiddling, trying to get a check and automount script to work