Unable to start debugging on the web server.

I have a project in the wwwroot folder(in my local machine) and using .NET 3.5 (Visual studio 2008). I have "admin" rights on the computer but I get the following error message when I try to debug the project: 

"Unable to start debugging on the web server. You do not have permissions to debug the web server process.You need to either be running as the same user account as the web server or have administrator privilege "

 Any suggestions on this?

Thank you,

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