Can't add a service reference

Question

I built a Solution that has to projects:

• ASP NET Empty Web Application
• WPF Application

The ASP NET App includes a WCF Data Service (which I named MyServiceServer) and an Entity Data Model generated from a SQL Server Express database (which I named MiniNorthwind, basically Northwind but with integer table keys and Foreign key relationships)

When I try to add a Service Reference to my WPF App (of the service that's located in the ASP Net app of the same solution), I use Discover, but it throws an error>

At the end of the error it suggest to try to rebuild the service, then I delete and add the whole service again several times until it is added successfully.

The problem is that somehow it loses configuration and the problem reappears when I run the whole app.

I included the app in SkyDrive MyServiceSolutionInIIS along with a backup of the MiniNorthwind database.

What could it be?