XML url data file is not load new file

[XML url data file is not load new file]

Problem: XML data file is not load new file when press once submit button but press again xml on fusion chart is call new file .
I have filter on page when i press search button  for send variable value to write xml file. It's normal working.
Help me Please.

Thank You.

 

 

This's my code.

<a href="#"  onclick="changeMonth4();">Search</a>
 <div id="chartContainer1">FusionCharts will load here!</div>          
          <script type="text/javascript">        
              var myChart1 = new FusionCharts( "Charts/MSColumn2D.swf", "myChartId1", "1000", "450", "0", "1" );
              myChart1.setXMLUrl("XML/data.xml");
              myChart1.render("chartContainer1");
			  
			   function changeMonth4()
				{
					var chartReference = FusionCharts("myChartId1");
					chartReference.setXMLUrl("XML/data.xml");
					//window.parent.updateChart(newXML); 
					//chartReference.addEventListener("Rendered", function () { FusionCharts("myChartId1").exportChart();  } );
				}