cd drive, yet another problem on the list

The other night i was busy putting songs onto itunes(2nd most recent as i havnt had a chance to get the new update) (on my ibook 800, 256mb ram). When all of a sudden i put a cd in my drive and it told me osX couldn't recognise any files on the disc. I tried another one and the same problem happened. I tried a third, which i had already put into itunes (so i knew it wasn't the discs) and the 'extra' (i.e videos and interview multimedia) content showed and was accessible, however the music files just weren't there. Has any one had this problem?is it fixable?is it itunes,osx or my drive? please please help me,quite worried about my baby.