[SPARCbook] CAn't boot any installer from a CD

[Michael M Delaney]

Hi,
I've tried installing netbsd 1.5 (two different iso's), 3 or 4 different
linux's, and netbsd 1.5 beta 2 (which worked before) and every installer
gives me the same error.  It can't seem to find the cd drive after it
boots from the cd and starts the installer.  I'm using an external aiwa 1x
drive that has worked before, can anyone help me out on this?
Thanks,
Mike