VS 2012 Projects "Unsupported" in VS 2012

Hello,

I have a solution with several projects in it that were created with VS 2012 Ultimate that was pushed to TFS.  When I pull it from TFS and try to open the solution fromVisual Studio 2012 Shell (Integrated), I get an "Unsupported" error dialog.

Here is the "Copy Information":

Unsupported
This version of Visual Studio does not have the following project types installed or does not support them. You can still open these projects in the version of Visual Studio in which they were originally created.
- AppWeb, "C:\App\AppWeb\AppWeb.csproj"
- App, "C:\App\App\App.csproj"
- AppCommon, "C:\App\AppCommon\Common.csproj"


No changes required
These projects can be opened in this version of Visual Studio without changing them. They will continue to open in Visual Studio 2010 SP1 and in this version of Visual Studio.
- App, "C:\App\App.sln"

I am assuming that there is an issue with VS 2012 Shell.  Is there any way that I can add C# & Web Application support on this version?  ...or am I incorrect that this is the problem?

Thanks,

D.Brooks