IIS8 Win8 and runAllManagedModulesForAllRequests="true"

I've solved the same problem by installing the window features "Internet Information Service/World Wide Web Service/Application Development/ASP.NET x.x" in the Control Panel of Windows8. If you want to setting on Windows Server 2012, the following link gives you hint. http://www.iis.net/learn/get-started/whats-new-in-iis-8/iis-80-using-aspnet-35-and-aspnet-45

hope that it works out.

For those of you running Windows Server 2012 the Application Development features are found at

[] Server Roles [] Web Server IIS [] Web Server [] Application Development [] ASP.NET x.x

When you select the .NET version it will ask if you want to add Extensions and other features. I just said yes, but you may be able to get away without installing those.