Power Mac G4 Cube refusing to boot mac os 9

Hi,
I have a Cube with Tiger on the internal disk. I want to install the latest firmware update for the thing, but it simply refuses to boot into OS9. I tried an iMac 9.2.2 disc, the restore disc it came with, and the 9.2.2 Classic folder on the hard drive. All three lead to a ? in front of a floppy. Both discs mount under tiger. What gives?

Dave H said:

If the hard drive was formatted with the 10.4 disk it might not have OS 9 drivers installed.
Disk Utility can tell if they are installed or not.

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How would that stop the CD from booting?

Dave H said:

It wouldn't. Has that exact CD worked before on the Cube?

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I've never tried it...
Any OS9 volume I try first brings up a flashing ? in front of a folder, then the disk spins and after a few seconds it brings up the flashing ? in front of a floppy.