Microsoft JScript runtime error: ASP.NET Ajax client-side framework failed to load.

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VS2008

hi,
I get error on master page
Microsoft JScript runtime error: ASP.NET Ajax client-side framework failed to load.
and
Microsoft JScript runtime error: 'Sys' is undefined

I have .net framework 3.5 and uses VisualStudio 2008.
I googled out try many of solutions, like add handler and module to web.config.
Script is enable on browser.
Tried <asp:ScriptManger> and <ajax:toolscriptmanager xmlns:ajax="#unknown"> both but still non solved.

Please, anyone can help me.

Thanks...

Posted 2-Dec-11 1:12am

pankaj88

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#realJSOP · Answer 1 · 2011-12-02T01:16:00

Solution 1

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

http://www.asp.net/ajax/downloads/[^]

Posted 2-Dec-11 1:16am

#realJSOP

Comments

sawant parag 22-Dec-11 2:00am

hi , i am getting run time error ."Microsoft JScript runtime error: 'Sys' is undefined". i am using ASP.NET 2.0. because my application is restricted to ASP.NET 2.0

help
thanks

Risha Goel 6-Aug-14 12:10pm

I have asp.net version 4.5 and i installed ajax 4.5...It is not loading it correctly..
Please tell me what to do now?