title: Could not find installable ISAM with Excel
body: <p>Here's my connection string:</p>
  
  <pre><code>Dim connString As String = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source='C:\clnts\Symphony.xlsx';Extended Properties='Excel 12.0 XML;HDR=No;IMEX=1;';"
  </code></pre>
  
  <p>I get "Cannot find installable ISAM" at Connection.Open</p>
  
  <p>I've tried every combination of quotes/single quotes that fixed it for other people on this site, but it still doesn't work for me. Any ideas?</p>