Please helip AjaxToolKit Editor error Please very urgent Ajax toolkit ver 4.00

Dec 2, 2013 at 1:48 PM
Edited Dec 2, 2013 at 1:49 PM
I am using web developer 2010 and operating system windows vista. Microsoft .net frame work
4.0 . I downloaded AjaxToolkit and added a tab name in toolbox of web developer with Ajax toolkit. After that I have created a form on that I placed ajaxtoolkit editor on that form. My code given below

<%@ Register assembly="AjaxControlToolkit" namespace="AjaxControlToolkit" tagprefix="asp" %>
<%@ Register assembly="AjaxControlToolkit" namespace="AjaxControlToolkit.HTMLEditor" tagprefix="cc1" %>

<asp:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server"
<cc1:Editor ID="Editor1" runat="server" />

When I am running the program error message is coming on ScriptResource.axd file like
Microsoft JScript runtime error: Sys.ArgumentUndefinedException: Value cannot be undefined.
Parameter name: type
var e = Function._validateParams(arguments, [
    {name: "type", type: Type},
    {name: "properties", mayBeNull: true, optional: true},
    {name: "events", mayBeNull: true, optional: true},
    {name: "references", mayBeNull: true, optional: true},
    {name: "element", mayBeNull: true, domElement: true, optional: true}
if (e) throw e; // The  error pointer will come here.
Please help to fix this problem . I posted this question in other site but didnot get any solution.

If you can help me it would be very appreciate