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Java Script Errors message


What does this error means and how to solve it???
Any ideas!!!!

Thank you!

Message: Sys.WebForms.PageRequestManagerParserErrorException: The message received from the server could not be parsed.
Message: ASP.NET Ajax client-side framework failed to load.
Message: 'Sys' is undefined.
Message: 'WebPartManager' is undefined
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2 Solutions
F IgorCommented:
It seems you need to add some code to include ASP.NET ajax framework, "AJAX tools" are not installed or loaded in your ASP.NET server

Check the ASP.NET version used for fompiling and AJAX tools version, may be some conflict or ASP.NET not updated.

Check some posts about the keyword "ASP.NET Ajax client-side framework failed to load"
Rad1Author Commented:
Please note:
When the page first loads it work without any errors.  The next time I click on the button that calls for Ajax use is when I get these errors.
Rad1Author Commented:
Could it be because the code can not find the Jquery is causing the errors?

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