Audio CD unrecognised in OSX


every time I try and read an audio cd in osx, I get an error message telling me the disk is not wholy formatted and asking me if I want to format it or eject it... all those cds are read fine in OS9§.
Anyone has a clue? I'm running an iMac DV with a CD burner under 10.0.4; should get 10.1 this WE and see if it works.
This bug can be ridiculous... I can burn audio CDs in iTunes, but when they are done I cant read them!