title: Why doesn't OR designer let me drag tables to design surface?
body: <p>I have a database hosted at <a href="http://somee.com" rel="noreferrer">somee.com</a>
  I have added a new connection in Server Explorer in VS 2012 and the test connection was successful. I can also successfully see the tables in the SE and any changes made to the database from the admin panel @ <a href="http://somee.com" rel="noreferrer">somee.com</a> also get reflected instantly in the server explorer. </p>
  
  <p>But when I'm trying to drag the tables onto the design surface, there is no feedback from OR designer, the <strong>cursor doesn't change to drag-n-drop</strong>, nor does it allow me to achieve the same. Also, I have noticed that selecting the table or any column in a table > <strong>properties shows all properties but they are disabled</strong> i.e I can't make any changes to the properties <strong>(they are read-only)</strong></p>
  
  <p>I have previously worked with LINQ-to-SQL classes but haven't experienced such a behaviour. I have always been able to edit properties and add tables to O/R deisgner.</p>
  
  <p>I have tried the same in a WPF application, WCF service with no success.
  Any ideas?</p>