Changing the navigation property names in Database First

Question

I have a bit of a problem. I have solution with projects

• BusinessLayer
• DataAccessLayer
• Domain Model

My DataAccessLayer contains edmx file and DomainModel tt file with model classes.

I changed tt file according to Improve navigation property names when reverse engineering a database and after that I get an error .. model is not part of the context exception.

This is the code that throws exception:

public static TestViewModel GetTestByPIN(string pin)
    {

        TestViewModel clFO = new TestViewModel();


        var client = from cl in db.Tests
                     where cl.PIN == pin
                     select cl;

Can anybody help me?