/PAE switch in BOOT.INI causes problem

Windows 2000 could not start because the following file is
missing or corrupt:

\system32\ntoskrnl.exe

Please reinstall a copy of the above file.

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After following the directions of MS KnowledgeBase article
Q268363 (modifying the boot.ini to include the /PAE
switch) the above message is when I get when I reboot.

I've looked all over the web and through
TechNet/KnowledgeBase without finding anything about this
possibility, anyone have any ideas? When I remove
the /PAE switch from the boot.ini the system is fine, no
problems.

Windows 2000 Advanced Server, sp2
6-way HP LH6000 U3, 6GB memory