Getting below when I move an App to a Server:

Parser Error Message: Could not load file or assembly 'AjaxControlToolkit' or one of its dependencies. The system cannot find the file specified.

Source Error:

Line 1: <%@ Page Title="Home Page" Language="C#" MasterPageFile="Site.master" AutoEventWireup="true"
Line 2: CodeFile="Default.aspx.cs" Inherits="_Default" %>
Line 3: <%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="asp" %>
Line 4: <%@ Register namespace="MyControls" tagprefix="custom" %>
Line 5:

Source File: /Default.aspx Line: 3

Assembly Load Trace: The following information can be helpful to determine why the assembly 'AjaxControlToolkit' could not be loaded.

WRN: Assembly binding logging is turned OFF.
To enable assembly bind failure logging, set the registry value [HKLM\Software\Microsoft\Fusion!EnableLog] (DWORD) to 1.
Note: There is some performance penalty associated with assembly bind failure logging.
To turn this feature off, remove the registry value [HKLM\Software\Microsoft\Fusion!EnableLog].

I have been researching extensively and cannot seem to resolve. Any thoughts please pass on.