I have a CD in my iMac that I'm unable to eject. I was able to download the music on the CD to iTunes but when I tried to eject it afterward I was unable to. The CD isn't showing up in Disk Utility, the Desktop, my Finder or in iTunes. My iMac is trying to eject it but can't. I've tried shutting down, restarting and ejecting from System Utilities. Nothing is working. My computer's about 3 years old and otherwise works great. Any ideas would be most appreciated - thanks!