title: POS For .NET: Failed to set property properties of PosPrinter
body: <p>I can't set properties of PosPritnter class. For example PageModeStation, PageModeVerticalPosition, PageModePrintArea etc.</p>
  
  <pre><code>PosPrinter posPrinter = (PosPrinter)posExplorer.CreateInstance(posPrinterInfo);
  posPrinter.Open();
  posPrinter.Claim(1000);
  posPrinter.DeviceEnabled = true;
  posPrinter.PageModeVerticalPosition = 10; //&lt;--- Exception thrown: Failed to set property PageModeVerticalPosition
  </code></pre>
  
  <p>Exception details:</p>
  
  <pre><code>    Microsoft.PointOfService.PosControlException was unhandled
      Message="Failed to set property PageModeVerticalPosition."
      Source="Microsoft.PointOfService"
      ErrorCodeExtended=0
      StackTrace:
             at Microsoft.PointOfService.Legacy.LegacyProxy.SetProperty(String propertyName, Object propertyValue)
             at Microsoft.PointOfService.Legacy.LegacyPosPrinter.set_PageModeVerticalPosition(Int32 value)
         ....
  </code></pre>
  
  <p>Any suggestions?</p>