Bouncing With Protools Burning In Itunes, Can't get bounced stereo wav in Itunes Options

[futurenow]

Hi There

I've been using ProTools for ages but am new to Mac's. I have a Powerbook G4 and Mbox setup for touring and as yet no mastering/burning software. For some unknown reason I cannot Import my bounced stereo files into Itunes to burn. If I choose add to library the files i wish to add are greyed out and can't be selected. i had no problem when I tried this previously and am at a loss as to what has changed. I did download updates recently and that is the only thing I can think of. Previously bounced files I had put into Itunes play/burn fine but bounces I do now i can't get into ITunes. It's probably something simple I am not picking up. Would love any advice as its getting irritating!

Craig