After following the following instructions on setting up authentication/membership via AD...
... I get the following error:
Server Error in '/SiteFinityTest1' Application.
This type of page is not served.
Description: The type of page you have requested is not served because it has been explicitly forbidden. The extension '.aspx' may be incorrect. Please review the URL below and make sure that it is spelled correctly.
Requested URL: /SiteFinityTest1/Sitefinity/Admin/Default.aspx
Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.1