Problem: In my win 7 development machine, and in order to use SQL Express for example instead of localdb is installed by default. I have unchecked "and use IIS Express" in my 4 property pages of an MVC project (network tab), then I get the following error: ASP. ... site to work correctly. I have verified that ASP.NET is activated in IIS functionality. Please tell me, what should i do to fix this?