If you are using an ASP.NET ScriptManager, switch to the ToolkitScriptManager in AjaxControlToolkit.dll

Hi

I am using Your Code following url

http://www.aspsnippets.com/Articles/Add-Edit-Update-Records-in-GridView-using-Modal-Popup-in-ASP.Net.aspx

I move to AjaxcontrolToolkit version 3.0 To 4.5 

I meet this error how to solve this 

This is my Issue

I am using AjaxControltoolkit version this -> Product Version: - 4.5.7.0429 But when i run my page i meet this error how to solve this ? My Error this ============== Uncaught Error: AjaxControlToolkit requires ASP.NET Ajax 4.0 scripts. Ensure the  correct version of the scripts are referenced.  If you are using an ASP.NET ScriptManager, switch to the ToolkitScriptManager in AjaxControlToolkit.dll I change scriptmanager to Toolscript manager some other issue came how to solve this any one guide me.