adding Ajax Control Toolkit

Hi experts,

I'm using Visual Studio 2010.
I create a blank asp.net website.
I'm using VB as the language.

After I created my blank website I went to this link:
http://ajaxcontroltoolkit.codeplex.com

I downloaded the Ajax Control Toolkit by clicking the big purple download button found at this link.

The file that is downloaded is called: AjaxControlToolkit.Binary.NET40.zip

So I unzipped it.

So then I right clicked on my project and Added a reference and then selected AjaxControlToolkit.dll from the file that I just unzipped.

So after I added this reference my project looks like this:

my app directory
If you scroll down the page at this link, they are doing an example using the HtmlEditorExtender.
http://ajaxcontroltoolkit.codeplex.com

I'm trying to do this same example.

So then in my project in the page called Test1.aspx
this is what my code looks like:

<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Test1.aspx.vb" Inherits="Test1" %>
<%@ Register TagPrefix="asp" Namespace="AjaxControlToolkit" Assembly="AjaxControlToolkit"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server">
        </asp:ToolkitScriptManager>
        <asp:TextBox
        ID="txtComments"
        TextMode="MultiLine"
        Columns="60"
        Rows="8"
        runat="server" />
        <asp:HtmlEditorExtender ID="HtmlEditorExtender1"
        TargetControlID="txtComments"
        runat="server" />
    </div>
    </form>
</body>
</html>

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But when I run this page I get this error:

error message on page run
Does anyone know why I'm getting this error and my Ajax HTMLTextEditor is not working?
Did I add the ajax toolkit wrong?

This is what my web.config looks like:

<?xml version="1.0"?>

<!--
  For more information on how to configure your ASP.NET application, please visit
  http://go.microsoft.com/fwlink/?LinkId=169433
  -->

<configuration>
    <system.web>
        <compilation debug="false" strict="false" explicit="true" targetFramework="4.0" />
    </system.web>

</configuration>

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LVL 1
maqskywalkerAsked:
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MrunalCommented:
Two solutions:

Please try both of them, one should be able to resolve your issue:

One

and

Two
0
APoPhySptCommented:
Hi, I haven't used ajaxtoolkit for a while now, but when I did this was not the way I knew it. for example, based on what I remember I would have written it like:

<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Test1.aspx.vb" Inherits="Test1" %>
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="ajaxToolkit" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <ajaxToolkit:ToolkitScriptManager runat="Server" EnablePartialRendering="true" ID="ScriptManager1" />
        <asp:TextBox
        ID="txtComments"
        TextMode="MultiLine"
        Columns="60"
        Rows="8"
        runat="server" />
        <ajaxToolkit:HtmlEditorExtender ID="HtmlEditorExtender1"     TargetControlID="txtComments" runat="server" >

    </div>
    </form>
</body>
</html>

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the ajaxtoolkit controls, when I used them it was generally used like ' <ajaxToolkit:HtmlEditorExtender'  and '<ajaxToolkit:ToolkitScriptManager'
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