Refresh Line chart values including Y Axis scale

I have a requirement that on an ajax call , I need to refresh chart values including Y axis scale.
I tried following which changes the scale values but rest of graph values disappear :-

Initiazation html,body { height: 100%; margin: 0px; overflow: auto; }
        <script src="dhtmlxChart/codebase/dhtmlxchart.js" type="text/javascript"></script>
<link rel="STYLESHEET" type="text/css" href="dhtmlxChart/codebase/dhtmlxchart.css">
<script src="dhtmlxChart/samples/common/testdata.js"></script>
<script>

var lineChart ;

window.onload = function(){

lineChart = new dhtmlXChart(
{ 'view':'line',
'value':'#yearsales#',
'container':'lineChart',
'label':'#bike#',
'radius':0,
'preset':'alpha',
'xAxis':{'template':'#bike#'},
'yAxis':{'title':'Sales per Bike'}});

dataset = [{"id":"1936","yearsales":"50000.00","bike":"CVO"},
{"id":"2011","yearsales":"24400.00","bike":"Dyna"},
{"id":"2086","yearsales":"15400.00","bike":"Sportster"},
{"id":"2161","yearsales":"31000.00","bike":"V-Rod"},
{"id":"2236","yearsales":"38000.00","bike":"Touring"},
{"id":"2311","yearsales":"33000.00","bike":"Softtail"}]



lineChart.parse(dataset,"json");
}


function replace(){

	lineChart.clearAll();
	lineChart = null;
	
	
	lineChart= new dhtmlXChart(
	{ 'view':'line',
	'value':'#yearsales#',
	'container':'lineChart',
	'label':'#bike#',
	'radius':0,
	'preset':'alpha',
	'xAxis':{'template':'#bike#'},
	'yAxis':{'title':'Sales per Bike'}});
	
	dataset = [{"id":"1936","yearsales":"4000.00","bike":"CVO1"},
	{"id":"2011","yearsales":"4400.00","bike":"Dyna1"},
	{"id":"2086","yearsales":"5400.00","bike":"Sportster1"},
	{"id":"2161","yearsales":"1000.00","bike":"V-Rod1"},
	{"id":"2236","yearsales":"8000.00","bike":"Touring1"},
	{"id":"2311","yearsales":"3000.00","bike":"Softtail1"}]



	lineChart.parse(dataset,"json");
	lineChart.refresh();
	


}


</script>



		<td><div id="lineChart" style="width:400px;height:400px;border:1px solid #A4BED4;"></div></td>
		<td><input type="button" value="ReDraw" onclick="replace()" />   </td>
</body>

Locally everything is fine event in IE7



What browser’s and dhtmlx versions you have?