Apple Cube OS9 command line problems.

I have a old Cube with a partioned HD with OS9.2 on one partition and OSX.2 on the other. Had been working fine with OS9, but tried to boot the OSX using "Start Disk" and it crashed giving me a command line. How can I reset the start disk to the OS9? Won't start from a CD for some reason and I can't seem to get it out of this loop.

This is what it gives me:

/etc.master.password: no such file or directory

sh-2.o5a# _

The only thing I can think of is to type "reboot" and it does...back to this command line. Not sure of what command I can use to get back to the original

OS9 boot. Any help would be appreciated. Trying to get this computer set up as a word processor for my daughter. Thanks in advance!!!