IBook won't recognize internal CD drive

Hi,
I was importing a CD in iTunes and it got to the very last bit of the last track then the progress bar just stopped (it no longer said how much time remained or the speed of the importing in iTunes).
I had to force quit iTunes. I couldn't get the CD out at all, so I restarted and held down the mouse button for ages, didn't work. Then I checked in System Profiler, clicked on "Disc Burning" and I got this message "No burning device was found. If you are using an external device please make sure that it is connected and powered properly."
I didn't bash the laptop about or drop it or anything. It was on a flat surface. What did I do wrong?
Because the CD is still in the drive I can't run Apple Hardware Test. Aargh!
Please help if you know anything that could solve this problem.
Thanks,
Jacob

I fixed the problem!
In case anyone else here comes across my problem, here's how I solved it.
I shut the computer down as opposed to just restarting. This forced the CD to stop spinning, so that when I turned on the computer again after about 10 seconds I held down the trackpad button and the CD ejected and now everything's fine.
Phew.

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