error with ScriptManager when upload my web site

<div align="center">
       <link href="cssUpdateProgress.css" rel="stylesheet" type="text/css" />

       <script type="text/javascript" language="javascript">
       var ModalProgress = '<%= ModalProgress.ClientID %>';

       </script>

       <div>

           <script type="text/javascript" src="jsUpdateProgress.js"></script>

           <asp:ScriptManager ID="ScriptManager1" runat="server">

           <asp:Panel ID="panelUpdateProgress" runat="server" CssClass="updateProgress">
               <asp:UpdateProgress ID="UpdateProg1" DisplayAfter="0" runat="server">
                   <progresstemplate>
                       <div style="removed: relative; removed 30%; text-align: center;">
                           <p>
                               <a style="font-family: Tahoma; font-size: 13px;">در حال عملیات</a></p>
                            <img src="images/loadinfo.net.gif" style="vertical-align: middle" alt="Processing" />
                           <p>
                               <a tyle="font-family:Tahoma;font-size:13px;">لطفا صبر کنید ...</a></p>
                       </div>
                   </progresstemplate>


           <ajaxToolkit:ModalPopupExtender ID="ModalProgress"  runat="server" TargetControlID="panelUpdateProgress"
               BackgroundCssClass="modalBackground" PopupControlID="panelUpdateProgress" />
       </div>
       <asp:UpdatePanel ID="UpdatePanel1" runat="server">
           <contenttemplate>
   <link href="css/grid.css" rel="stylesheet" type="text/css" />
   <%--<form id="form1" runat="server">--%>
   <div align="center"></div></contenttemplate></div>

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: Method 'get_EnableCdn' in type 'System.Web.UI.ScriptManager' from assembly 'System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' does not have an implementation.

Source Error:

Line 28:             <script type="text/javascript" src="jsUpdateProgress.js"></script>
Line 29: 
Line 30:             <asp:ScriptManager ID="ScriptManager1" runat="server">
Line 31:             
Line 32:             <asp:Panel ID="panelUpdateProgress" runat="server" CssClass="updateProgress">