title: Unable to select a system DSN when adding a data connection to Server Explorer
body: <p>In Visual Studio 2010, attempting to use the Server Explorer to add a data connection.</p>
  
  <p>From the <strong>Change Data Source</strong> screen I select <em>Microsoft ODBC Data Source</em> which moves me to the <strong>Add Connection</strong> screen.  However, the dropdown for <em>Use user or system data source name:</em> only contains my user DSNs.  My system DSNs are not shown.</p>
  
  <p>I'm running on Windows 7, 64 bit and ran Visual Studio as administrator.  The missing system DSNs use the SQL Server Native Client 10.0, but an equivalent user DSN using the same driver appears in the list.</p>