I just updated my website from MVC 4 to MVC 5.
Now when I want to run it on my web server instead of my development machine it does not work.
It think it is beca
When you deploy your app just make sure that all the assemblies are being deployed to your production environment in the bin folder. ASP.NET MVC is an xCopy deployment, so you don't have to install anything.
You might want to check that your Production environment has ASP.NET 4.0 and 4.5 registered.