Reference not showing in VS 2010 project

Question

Hello,

Has anyone had an issue adding an existing project to a Silverlight business application and unable to use that new reference? I had an existing project folder that I am trying to import into a new app and I am unable to see any of the properties of the new project that I added.

using dt.Model;

The above gives me a red line under Model. Here is the main folder structure of my project that you would see in the Solution Explorer.

dt
dt.Model
dt.Web

And the strange thing is that I am able to reference dt.Web in any of my files, just not dt.Model.

Thanks for the help.