title: can't show a stimulsoft report more than 1 time
body: <p>I've created a simple report in vs.net 2008 with stimulsoft report 2013.
  I'm using these codes to show report:</p>
  
  <pre><code>    StiReport1.RegData(ds)
      StiReport1.Render()
      StiReport1.Show()
  </code></pre>
  
  <p>when I click on the button <strong>I Can see the report correctly</strong> for the first time.
  but when i close the reportviewer's Windows and click on that button again the 
  report is empty (I can see the header or footer but no data loaded on the report)
  I think the report data not load again or something saved on cache.
  please Help.
  Thanks</p>