ASP.NET AJAX Controls don't work

[Oksana]

I've upgraded the web site to dot.net framework 4 and Telerik ASP.NET Ajax Controls 2013 Q1 (also tried 2012 Q3) framework 4.0.
It's Windows Server 2008, IIS 7,
Application Pool is .NET fr. 4.0.30319, Integrated mode, Local System account

Telerik Controls do not respond on click events.
RadTabStrip, RadComboBox, RadMenu, RadToolbar

Can see JS error in Web developer tools:
Uncaught ReferenceError: Sys is not defined Uncaught ReferenceError: Telerik is not defined
and many of those:
Failed to load resource: the server responded with a status of 404 (Not Found) ....


web config sections:

<handlers>
   <remove name="Telerik_Web_UI_WebResource_axd"/>

   <add name="Telerik_Web_UI_WebResource_axd" preCondition="integratedMode"

       path="Telerik.Web.UI.WebResource.axd" type="Telerik.Web.UI.WebResource"

       verb="*" />
</handlers>
<modules runAllManagedModulesForAllRequests="true">

  <remove name="RadCompression"/>
  <add name="RadCompression" type="Telerik.Web.UI.RadCompression" />
</modules>
<pages enableViewStateMac="false" clientIDMode="AutoID">

  <controls>
    <add assembly="Telerik.Web.UI" namespace="Telerik.Web.UI" tagPrefix="telerik"/>

  </controls>
</pages>

ok, found it, i was using asp ScriptManager on the master which was not registered in web config 
the solution is or register it or use the Telerik Rad.ScriptManager

[Kate]

Hello Oksana,

The exception that you are getting indicates that any of the scripts needed for the RadControls to work properly does not get loaded on the page. Please refer to the following help articles where you can find more detailed information on how to resolve the exceptions that you get:

• Web Resources Troubleshooting
• General Troubleshooting

Greetings,
Kate
the Telerik team

[Andrew]

My solution was to remove "runtimeVersionv2.0" from
<add name="Telerik_Web_UI_WebResource_axd" path="Telerik.Web.UI.WebResource.axd" type="Telerik.Web.UI.WebResource" verb="*" preCondition="integratedMode,runtimeVersionv2.0"/>