title: Database "cannot be opened because it is version 661" when attaching .mdf file
body: <p>I am trying to attach MvcMusicStore.mdf to my .\SQLEXPRESS instance (sql server version 10.0.2531) in sql server 2008 R2 management studio. I got the db from this project:
  <a href="http://mvcsitemap.codeplex.com/releases/view/67151" rel="nofollow">http://mvcsitemap.codeplex.com/releases/view/67151</a></p>
  
  <p>When i am trying to attach i am getting an error?:</p>
  
  <pre><code>The database 'C:\PROJECTS\CODEPLEX\TFS10\MVCSITEMAP\BRANCHES\3.1.0\SRC\MVCSITEMAPPROVIDER\MVCMUSICSTORE\APP_DATA\MVCMUSICSTORE.MDF' cannot be opened because it is version 661. This server supports version 655 and earlier. A downgrade path is not supported.
  </code></pre>
  
  <p>Do I need to upgrade my sql server or what else?</p>