Error loading EntityFramework 4.3.1

I created an MVC application in C#. I created a new project in my solution called PhoneDomain. The purpose of this is to separate my data and domain layer from the actual problem. I right clicked on the project and went to "Add Library Package Reference" and I attempted to add the EntityFramework package (version 4.3.1). It said "`Operation Failed`" "`This package contains an init.ps1 file and needs to be installed from the Package Manager Console`". So I opened the Package Manager Console in Visual Studio and typed the following into the console window: `install-package EntityFramework -project PhoneDomain` After a couple seconds, it installed the package and said `Successfully added 'EntityFramework 4.3.1' to PhoneDomain` The problem is, when I run my application, I get the following error message: `Could not load file or assembly 'EntityFramework, Version=4.3.1.0, Culture=neutral' or one of its dependencies. The system cannot find the file specified.` The reference in the PhoneDomain is definately there and the the `Copy Local` property is set to `True`. Can anyone tell me what is going on here?