I have a silverlight application (using MVC) and when i'm building in visual studio, using Visual Studio Development center, there's no problem, the HttpContext.Current.User.Identity.Name has a Value
But when i'm using the same project with IIS 7.5 (i'm using Windows 7), HttpContext.Current.User.Identity.Name stays empty
Anyone who can help? Or knows where i can find the settings from the visual studio Development center, so i can check what's wrong in IIS?