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ASP.NET

Hi,

step1:
I opened computer management and added a new group.
I named it "MyGroup" and myself as a user.

step2
I created a simple / dummy asp.net application.

In the web.config, under authentication i selected 'windows' and
under authorization, i wrote the statement
allow roles = "machinename.MyGroup"

However, failed to successfully view the default page and got an error message which states access denied.

Where did i go wrong?

Regards,
Netquestions