Add Controller in MVC4 not working

I'm using VS 2010 Premium. I have a MVC4 project using SqlCe 4.0 with a entity framework model.

Model is:

  public class ProjectBuild
    {
       public int ProjectBuildID {get;set;}
       public string name {get;set;}
    }

  public class ProjectBuildContext:DbContext
     {
       public DbSet<ProjectBuild> builds {get;set;}
     }

Below is my connection string:

 add name="ProjectBuildContext" connectionString="Data Source=|DataDirectory|DB.sdf"
 providerName="System.Data.SqlServerCe.4.0"

When I try to create a new controller with the built in scaffolding too I get the following error:

"Unable to retrieve metadata for ProjectBuild"."Using the same DbCompiledModel to create contexts against different types of database servers is not supported. Instead, create a separate DbCompiledModel for each type of server being used.