Hi Dhruva, 
The URL I am providing is relative to the app.  Here's my HTML source if that provides any clues.  I have tried this with several different charts (2d and 3d line, area, bar, etc.) and the charts all render as expected -- except for the logo. 
Thanks! 
Mike  
 
<html> 
<head>
 <script language="JavaScript" src="/Proto_CP2/fusioncharts/FusionCharts.js"></script> 
 <style type="text/css">
 #content { width: 935px ; margin-left: auto ; margin-right: auto ; }
 </style>
</head>
<body>
 <div id="content" >
 <div id="testChart">
 </div> 
 <script type='text/javascript'> 
  var chart = new FusionCharts('/Proto_CP2/fusioncharts/ScrollArea2D.swf', 'chart', '935', '550', '0', '1'); 
  chart.setDataURL('/Proto_CP2/app/temp/data.xml'); 
  chart.render('testChart'); 
 </script>
 </div>  
</body>
</html>