title: Connection string for SQL Server Express 2014
body: <p>On Win 7 system I installed SQL Server 2014 Express. I created instance <code>HM1</code>. I've set it up to use mixed mode. I created a SQL Server user and I am able to login with no issue. </p>
  
  <p>My goal is to connect to a database using this SQL Server user using configuration file. This connection will be used for another application. Note: if I disable user/password usage during login I have no problem but I have to use credentials. </p>
  
  <p>For connection I provided <code>machine_name\SQLSERVEREXPRESS\HM1</code>. I also provided username and password. I also changed the service for <code>SQLEXPRESS</code> and <code>HM1</code> to run as local account. </p>
  
  <p>When I try to connect using that file I've got the error </p>
  
  <blockquote>
    <p>Can't connect to database</p>
  </blockquote>
  
  <p>Again if I disable user/password usage I am able to connect using the same file with no problem.</p>
  
  <p>Could someone help me with it?</p>
  
  <p>Thanks</p>