Get this! I once wrote a program (to be installed on numerous servers I had no control over) that broke on account of that problem AND this little gem:

http://support.microsoft.com/support/kb/articles/Q184/3/20.ASP

Like, Yes, we know it's a standard, but we think it's plain wrong so we don't do it that way over here, mmmkay?

The good news for you is that your problem is solved if you run the program as a Perl ISAPI instead of as a CGI. It may require IIS 5 to work.

The Perl ISAPI plugin is distributed with ActivePerl.

/J