包含。优化和Microsoft.Web。优化不会在vs 2012中加载参考

I'm working on an MVC 4 project started in Visual Studio 2010. Right now I'm working on a machine with Visual Studio 2012 as I don't have access to the machine I was originally working on. I tried all morning to find answers, but they don't seem to help my situation.I'm working on an MVC 4 project started in Visu