iTunes freezes when playing/importing some CD's


Im using an iBook G4 with OS X Tiger and iTunes 6.

Sometimes when I try to play certain cd's in iTunes or try to import certain cd's iTunes freezes until I eject the CD (which takes roughly 30 seconds once iTunes has froze). Most of the time iTunes has no problems with my cd's but with a couple of them this happens. The cd's are in good condition with no scratches, I can't understand it. I have noticed that a couple of the cd's giving me the problem are ones that would open up their own menu if I put them in the PC, could this have some relation to it?

It's a bit of a strange one that I can't seem to find an answer to, does anyone have any suggestions?