troubleshooting Question 4.0 AJAX Controls Failing

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jaytechnologyFlag for Afghanistan asked on
AJAXASP.NETMicrosoft Development
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I have created an application in Vs2010 VB.  After I installed the newest version of Ajax 4.1.5 and registerd it within VS, I added a script manager to the page No Problem.  I then add a Calendar extender but received the following error.

I am running .net 4.0  

IIS7 also.  

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