In OSX now won't boot back to OS9 Help!

Hi Folks! I've done this before but it's been a while and I've forgotten how to resolve the problem. I usually use OS9 on this computer but i booted into X and then used classic and now it won't boot back to OS9. You can select the OS9 drive in the startup panel but it just boots back to X. Using an option boot the OS9 drive doesn't show up. The only thing I did was startup classic using the system folder on that separate OS9 drive. Why would starting up classic render a perfectly good boot drive inoperable. I ran Diskwarrior on it to make sure the directory was in good shape. The OSX is one one drive and the OS9 is on another. Tom

Hi Tom-
Do you need to rebless the system folder?
http://docs.info.apple.com/article.html?artnum=58042

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