title: asp.net4.5 AjaxControlToolkit error version in webform
body: <p>I was trying to use AjaxFileupload but couldn't because "may be missing some components" Ajax Toolkit components "Ajax Control Toolkit .NET 4.5" <a href="http://ajaxcontroltoolkit.codeplex.com/releases/view/116091" rel="nofollow">http://ajaxcontroltoolkit.codeplex.com/releases/view/116091</a>. After installation? I did my upload with ajax easily but know i'm facing this issue sometime : </p>
  
  <blockquote>
    <p>Server Error in '/' Application.
    The requested script resource 'Compat.Timer.Timer.js' requires version 'AjaxControlToolkit, Version=4.5.7.1213, Culture=neutral, PublicKeyToken=28f01b0e84b6d53e' of the ASP.NET AJAX Framework. To use this resource, make sure that the application references version 'AjaxControlToolkit, Version=4.5.7.1213, Culture=neutral, PublicKeyToken=28f01b0e84b6d53e'.</p>
    
    <p>Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. </p>
    
    <p>Exception Details: System.InvalidOperationException: The requested script resource 'Compat.Timer.Timer.js' requires version 'AjaxControlToolkit, Version=4.5.7.1213, Culture=neutral, PublicKeyToken=28f01b0e84b6d53e' of the ASP.NET AJAX Framework. To use this resource, make sure that the application references version 'AjaxControlToolkit, Version=4.5.7.1213, Culture=neutral, PublicKeyToken=28f01b0e84b6d53e'.</p>
  </blockquote>
  
  <p>Project became unstable. I try to remove and reinstall (<a href="https://stackoverflow.com/questions/13439213/ajax-control-toolkit-asssembly-reference-error">Ajax control toolkit asssembly reference error</a>) but without success ( 
  I deleted all file in project and download 2 day earlier version from server but it didn't help !!! are there anything i have to do?? I can move more because i'm using a lot of Ajax in this project !!!</p>
  
  <pre><code>    &lt;%@ Page Title="" Language="C#" MasterPageFile="~/Site.Master" AutoEventWireup="true" CodeBehind="Defaut.aspx.cs" Inherits="Group" %&gt;
  
      &lt;%@ Register assembly="AjaxControlToolkit" namespace="AjaxControlToolkit" tagprefix="asp" %&gt;
  </code></pre>
  
  <p>in body: call scripttool</p>
  
  <pre><code>    &lt;asp:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server" CombineScripts="True"&gt;&lt;/asp:ToolkitScriptManager&gt;
  </code></pre>
  
  <p>In Config something like this:</p>
  
  <pre><code>  &lt;pages controlRenderingCompatibilityVersion="4.0"&gt;
    &lt;controls&gt;
      &lt;add assembly="Microsoft.AspNet.Web.Optimization.WebForms" namespace="Microsoft.AspNet.Web.Optimization.WebForms" tagPrefix="webopt" /&gt;
      &lt;add tagPrefix="ajaxToolkit" assembly="AjaxControlToolkit" namespace="AjaxControlToolkit" /&gt;
    &lt;/controls&gt;
  &lt;/pages&gt;
  </code></pre>
  
  <p>Can Someone help ? </p>
  
  <p><strong>edit:</strong> It's like that this error is more often with Chrome and Safari. (At the moment Fierox and IE seems to work)</p>