Unable to install Win2k Component

Has anyone run into this problem before?
I can install any other Microsoft Networking services
except IAS. Whenever it goes through the install, it
stops midway and gives me this error:

"Could not install or remove the Internet Authentication
Service component because its administration tool is not
present or is damaged".

I've never installed IAS on this Win2K server prior and
tried upgrading from SP3 to SP4 to see if it would make a
difference.

I then tried uninstalling the administration tools and
installing it straight from the adminpak.msi file located
on the Win2K CD.

Anybody have any idea on where to start troubleshooting
this error. The only other service running on the server
was a test SQL2K with SP3 which I've removed as well.

Short of blowing away the box, I'm not sure what can be
done as I've found no references to this error msg on
Microsoft's web site.