Chart is not working in IE7 & IE8 but working IE9. Pls help?

I am using dhtmlx stacked bar chart to display the data. It is displaying the chart in firefox and IE9. But the chart is not displaying IE7 and IE8 and IE9 compatibility mode. As the forum thread I have placed the thirdparty folder where the dhtmlxchart.js placed. Still dont have any luck and also tried as the viewtopic.php?f=8&t=20960 thread. But not working. Please help me to fix this issue.
Velmurugan T


the issue looks like thirdparty is not included. Try to run online samples in IE: … scale.html

Is the problem reproduced there ?