Ajax Client side script error

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if (typeof(Sys) === 'undefined') throw new Error('ASP.NET Ajax client-side framework failed to load.');

I am using .Net framework 4.0 and visual studio 2010 ultimate .ajax is installed in my system

How can I resolve this problem. plz reply

Posted 27-Sep-11 0:59am

Updated 27-Sep-11 15:20pm

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P.Salini · Answer 1 · 2011-09-27T01:03:00

You need to install Ajax Extensions and Ajax ToolKit for .NET 3.5.

Check here :http://www.asp.net/ajax/downloads/

also you can refer this link
http://weblogs.asp.net/lkempe/archive/2007/08/04/asp-net-ajax-and-url-rewriting-issue.aspx[^]

If your problem is not cleared then please go through this link
some more solutions are there.

Google