IIS 5.1 ASP security error on localstart.asp

Let me know if there is a better group for this question.

I am unable to get ASP pages processed on local web server. Running XP Pro.
Tried the MSDN suggestions on allowing/disallowing anonymous access. The
browser asks me for permission, I put in both my admin account and try to log
in as administrator, but neither works and it gives me the 403 forbiden
screen. The local web server will serve up non-asp pages. I do have .NET 3.0
installed.

Any suggestions?

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Thank you for your help.