When I insert an audio or data cd it doesn't respond. The cdrom is just not working.
didn't respond? The CD-Drive? The desktop? Your nose?
1. CD-drive unresponsive: check to see that the front led on the drive flickers and/or there is a whirring noise when the drawer closes. If not, then the drive is broken. Get a new drive.
2. no response from the desktop: either the drive isn't detected or udev isn't set up properly, of fstab is not set up properly. Is this a new drive?
What is the output of:
dmesg | grep cdrom
look through the syslog to find out what device your cdrom is assigned to. Typically hdc, or sdc, but could be all kinds of things.
Try to mount the drive manually (sudo mount -t iso9660 /dev/hdc /mnt) ... use a data CD.
3. Can't help you there man... well, I suppose you could try wearing less scent?