http://blogs.msdn.com/joestagner/archive/2008/04/02/making-nested-asp-net-applications-work.aspxHave you ever tried to set up a web site and use 2 popular ASP.NET applications ? Did you get THIS ? I did. I set up BlogEngine.net in c:\inetpub\wwwroot - it worked fine ! Then I set up ScrewTurnWiki in c:\inetpub\wwwroot\wiki. Now, ScrewTurnWiki isen-USCommunityServer 2.1 SP1 (Build: 61025.2)