Problems mounting a multi session CD.

Hi everyone.

I'm having problems getting to the data part of a CD. It happens with a couple 
of CD's that I own. One of which is Diskworld2, and the other is Filter - the 
Amalgamut

I know there's multimedia content on the drive but when I go to mount it I get 
a message,

Could not mount device.
The reported error was:
/dev/cdrecorder: Input/output error
mount: I could not determine the filesystem type, and none was specified

I can play the audio though.

My FSTab file has these settings.
/dev/cdrecorder	/media/cdrecorder	auto ro,noauto,user,exec 0 0

Any Ideas?

Jason