I have similar diagrams running in IE 9 without problems. Other people have noticed this problem when there is some code collusion on the page.
So, try creating a page that only launches charts, nothing more. If it works, some code appears on the page that prevents the chart from being created.
I got your diagrams to run in IE 8 and 9:
http://www.jensbits.com/demos/charts.php
I found IE to be especially intolerant of code that confuses him.
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