Ajax sample not working on IE9 on AJAX website IE9, Win 7

I am using this AJAX sample on my production website:
http://www.asp.net/ajax/ajaxcontroltoolkit/Samples/Animation/Animation.aspx

It has worked for 2 years and now IE9 is out and it will not work on Windows 7 IE9.   Can someone offer any insight?
arthurh88Asked:
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John ClaesSenior .Net Consultant & Technical AnalistCommented:
I'm afraid it looks like it is a real issue with IE 9

you can enforce IE8 emulation using the compatability meta tag.
<meta http-equiv="X-UA-Compatible" content="IE=EmulateIE8">

or you can enforce users to use the compatibility mode
see for further info and code :
http://forums.asp.net/t/1670668.aspx/1?ASP+net+Menu+Control+With+IE9
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