ASP.NET-4 IIS7.5 web.config serverRuntime element

Question

Whenever I add this line to my web.config in the system.webServer section:

With our without properties, IIS 7.5 just se

Answer 1

I had this exact problem and solved it by unlocking the serverRuntime section of the applicationHost config. Command to run at console:

%windir%\system32\inetsrv\appcmd unlock config -section:system.webServer/serverRuntime