Laptop User Question

So, I'm playing with my iBook (G4), and I decide to burn a mix. I insert a blank CD, and iTunes stops responding. I force it to quit and reopen it, and it claims to not be able to find its cd burning files. I download iTunes from Apple, install it, restart, and try again, with the same result. Also, the CD is not showing up on the desktop, and I can't eject it.

So, what if anything can I do now, to avoid an expensive trip to the Galleria?