title: Report RDLC, report datasource now missing
body: <p>I have to modify one of the reports that our system produces. 
  These reports are generated using RDLC files.</p>
  
  <p>I've added the necessary back end to get the info needed for the new field "EmployeeName".</p>
  
  <pre><code>//lunchtime report
  lunch.Reason = request.SqlDataReaderResult["Reason"].ToString();
  lunch.Record_No = (int)request.SqlDataReaderResult["Record_No"];
  lunch.Seq = (int)request.SqlDataReaderResult["Seq"];
  lunch.EmployeeName = request.SqlDataReaderResult["EmployeeName"].ToString(); // new field
  </code></pre>
  
  <p>But when i do a call in my rdlc file</p>
  
  <p>"=Fields!EmployeeName.Value"</p>
  
  <p>it causes an error:</p>
  
  <pre><code>Error   1   The Value expression for the textbox ‘textbox14’ refers to the field ‘EmployeeName’. Report item expressions can only refer to fields within the current data set scope or, if inside an aggregate, the specified data set scope.
  </code></pre>
  
  <p>I went to try remove the Datasource and re add it for the RDLC, but it is no longer appearing in the list of datasources.</p>
  
  <p>anyone have this issue before?</p>