title: EF4 connection problem
body: <p>I'm working with Visual Studio 2010 express and MSSQL 2008 R2 express.
  I've created model from DB tables.</p>
  
  <p>Now I have problem with connection.
  When I connected to DB with Management Studio, I can't run my project, I'm receiving exception with message "The underlying provider failed on Open".</p>
  
  <p>Restart of SQL instance helps, than I can run my project and work with entities, but after that I can't connect to DB from Management Studio.</p>
  
  <p>To connect successfully, I need to restart SQL server instance again.</p>
  
  <p>Are there some ways to do that simultaneously?</p>