nhfinancials on "widget"

Hi,

I'm trying to add a widget to my blog from: http://widgets.freestockcharts.com/

the html code is:

<!-- Start FreeStockCharts.com Chart Widget -->
<p width="100%" align="center">
<iframe width="300" height="300" scrolling="no" frameborder="0" style="border:none;" src="http://widgets.freestockcharts.com/WidgetServer/InteractiveChartWidget.aspx?guid=undefined&w=300&h=300"></iframe>
</p>
<!-- End FreeStockCharts.com Chart Widget -->

Unfortunately I'm not able to add/use it.

Any suggestions how to do it?

Thanks