title: Microsoft ACE OLEDB provider throws could not find installable ISAM exception
body: <p>I'm trying to read Excel spreadsheets with a 64bit Process. Therefore I use the 64 bit Version of <a href="http://www.microsoft.com/downloads/details.aspx?familyid=C06B8369-60DD-4B64-A44B-84B371EDE16D&amp;displaylang=en" rel="noreferrer">Micorosft Access Database Engine 2010</a>.</p>
  
  <p>The following code</p>
  
  <pre><code>var cs = @"Provider=Microsoft.ACE.OLEDB.12.0;"
           + @"Data Source=C:\test.xls;"
           + @"Extended Properties=""Excel 14.0;""");
  
  con = new OleDbConnection(cs);
  con.Open();
  </code></pre>
  
  <p>throw an Exception:</p>
  
  <p>Could not find installable ISAM</p>
  
  <p>Using google I found a lot of questions about this exception. But they refer to JET and seem not apply to my problem.</p>
  
  <p>Any recommendations?</p>