%1 is not a valid Win32 application?

[Mark Space]

  Just a quick update:

I decided to rename the extension for python scripts ".pycgi".  Ok, so 
when I did so, I decided to test. Result: with .pycgi in the IIS Admin 
properties, test.cgi STILL returns "%1 is not a valid Win32 
application."  Wow.  So it's like IIS is ignoring the .cgi rule I added 
somehow.

Second, once I renamed test.cgi to test.pycgi, the file time is totally 
unrecognized.  My browser (Mozilla) declares the type of test.pycgi to 
be unrecognized and askes me if I want to download instead.  I even 
added the .pycgi rule to the vitual directory where the script lives and 
I get the same result.

Help!