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

I installed a Ajax Control Tool Kit  and wrote a simple code it works fine in local host but when i upload the application on the server i am getting an parser error like:

Parser Error
Description: An error occurred during the parsing of a resource required to service this request. Please review the following specific parse error details and modify your source file appropriately.

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:  <%@ Control Language="C#" AutoEventWireup="true" CodeFile="Featuredhotels.ascx.cs" Inherits="Featuredhotels" %>
Line 2:  <%@ Register assembly="AjaxControlToolkit" namespace="AjaxControlToolkit" tagprefix="cc1" %>
Line 3:  <style type="text/css">
Line 4:  
 
Source File: /ajaxchains/Featuredhotels.ascx    Line: 2

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].

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Version Information: Microsoft .NET Framework Version:2.0.50727.3082; ASP.NET Version:2.0.50727.3082

 I have:
Installed Visual Studio 2008 on my PC
Installed .NET Framework 3.5 on the Web Server
Installed AJAX Control Toolkit on my PC

What is the problem?