title: .edmx file cannot update the model, not able to select the tables
body: <p>I am opening the WebStoreDBModel.edmx file.  Inside of the file I right click Update Model from Database.  There I am in the ADD tab, but I cannot select the TABLES or anything else (Views or Stored Procedures and Functions).  I have a dababase with 3 tables connected together (Category, Cart, Product).  Can someone explain me why I am not able to regenerate the model ?   I need to regenerate because When I am trying to Add a new Controller it display No Model Classses are available.  Please check that the project has been compiled.    I did  DEBUG / BUILD my project.   Any idea ?</p>