title: Login fails when try to connect by app but not by the Management Studio
body: <p>I have a WebSite that just don't connect to database. Both are on my local machine.
  Using the same parameters (Host, User ID, Pwd and Database) I can connect with the MS SQL Server Management Studio.</p>
  
  <p>What can by my problem??</p>
  
  <p>Here goes the two ConnectionStrings I'm trying to use:</p>
  
  <p><code>Data Source=VIVID-28\MSSQLSERVER1;Initial Catalog=DicionarioDados;Persist Security Info=True;User ID=VIVID-28\Development;Password=*******</code></p>
  
  <p><code>Server=VIVID-28\MSSQLSERVER1;Database=DicionarioDados;Integrated Security=SSPI;User ID=VIVID-28\Development;Password=*******</code></p>
  
  <p><code>VIVID-28</code> Is the name of my machine.
  <code>MSSQLSERVER1</code> Is the Instance.</p>