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. \[quote\] Parser Error Message: '(Default)' is not a valid value for attribute 'culture'. Source Error: Line 1: <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="HomePage.aspx.cs" Inherits="FundingWebsiteAspnet.HomePage" Line 2: MasterPageFile="MasterPageForTheFundingWebsite.master" Culture="(Default)" %> Line 3: Source File: /HomePage.aspx Line: 1 Also this error messageWarning 1 C:\Users\shussain2\Documents\CTRP\FundingWebsiteAspnet\FundingWebsiteAspnet\HomePage.aspx: ASP.NET runtime error: Could not load file or assembly 'Telerik.Web.UI, Version=2013.1.220.40, Culture=neutral, PublicKeyToken=121fae78165ba3d4' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040) C:\Users\shussain2\Documents\CTRP\FundingWebsiteAspnet\FundingWebsiteAspnet\HomePage.aspx 1 1 CTRP\[/quote\]What can I do to fix this problem? I had the idea to downgrade but i want the new controls to be compatable with it.Code HOMEPAGE.aspx\[code\]<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="HomePage.aspx.cs" Inherits="FundingWebsiteAspnet.HomePage" MasterPageFile="MasterPageForTheFundingWebsite.master" <%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="cc1" %><asp:Content ID="mainContent" ContentPlaceHolderID="mainContentPlaceholder" runat="server"> <head> <link rel="stylesheet" type="text/css" href="http://stackoverflow.com/questions/15643674/StyleSheetForTheFundingWebsite.css" /> <style type="text/css"> .modalBackground { background-color: Gray; filter: alpha(opacity=70); opacity: 0.7; border: 5px border-color: Black; border-style: solid; } .pnlBackGround { position: fixed; top: 10%; left: 10px; width: 650px; height: 300px; background-color: White; border: solid 3px black; } </style> </head> <form id="form1" runat="server"> <cc1:ToolkitScriptManager ID="TKSM" EnablePageMethods="true" EnableCdn="true" ScriptMode="Release" runat="server"> </cc1:ToolkitScriptManager> <asp:GridView ID="GridView1" runat="server" AllowPaging="False" AllowSorting="False" AutoGenerateColumns="False" AutoGenerateEditButton="False" CellPadding="4" DataKeyNames="Study_Number" Width="100%" SkinID="Summary" OnRowCommand="grd_ReturnItems_RowCommand" DataSourceID="SqlDataSource1" ForeColor="#333333" GridLines="None" Height="236px" OnSelectedIndexChanged="GridView1_SelectedIndexChanged"> <AlternatingRowStyle BackColor="White" /> <Columns> <asp:TemplateField > <ItemTemplate> <asp:LinkButton ID="LinkButton1" runat="server" >Edit</asp:LinkButton> </ItemTemplate> </asp:TemplateField> <asp:CommandField EditText="Vaishali" /> <asp:BoundField DataField="PI" HeaderText="PI" SortExpression="PI" /> <asp:BoundField DataField="Study_Number" HeaderText="Study_Number" ReadOnly="True" SortExpression="Study_Number" /> <asp:BoundField DataField="Study_Title" HeaderText="Study_Title" SortExpression="Study_Title" /> <asp:BoundField DataField="Disease_Code" HeaderText="Disease_Code" SortExpression="Disease_Code" /> </Columns> <FooterStyle BackColor="#990000" Font-Bold="True" ForeColor="White" /> <HeaderStyle BackColor="#990000" Font-Bold="True" ForeColor="White" /> <PagerStyle BackColor="#FFCC66" ForeColor="#333333" HorizontalAlign="Center" /> <RowStyle BackColor="#FFFBD6" ForeColor="#333333" /> <SelectedRowStyle BackColor="#FFCC66" Font-Bold="True" ForeColor="Navy" /> <SortedAscendingCellStyle BackColor="#FDF5AC" /> <SortedAscendingHeaderStyle BackColor="#4D0000" /> <SortedDescendingCellStyle BackColor="#FCF6C0" /> <SortedDescendingHeaderStyle BackColor="#820000" /> </asp:GridView> <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:adm_productionConnectionString %>" SelectCommand="SELECT [PI], [Study Number] AS Study_Number, [Study Title] AS Study_Title, [Disease Code] AS Disease_Code FROM [Study_Disease_Code_association]"> </asp:SqlDataSource> <cc1:ModalPopupExtender ID="mpe_EditReturnItemPopup" runat="server" TargetControlID="btn_Hidden1" PopupControlID="EditReturnItemDialog" BackgroundCssClass="modalBackground" CancelControlID="btn_EditReturnItemCancel" DropShadow="false" PopupDragHandleControlID="EditReturnItemDialogHeader" OkControlID="btnOk" X="20" Y="100" /> <aspanel ID="EditReturnItemDialog" runat="server" Style="display: none; width: 300px" CssClass="pnlBackGround"> <br /> Please Enter Disease Code : <table> <tr> <td> <br /> Select Disease Code Type: <telerik:RadDropDownList ID="radDropDownDiseaseType" runat="server"> </telerik:RadDropDownList> </td> </tr> <tr> <td> <br /> Select sub-category : <telerik:RadDropDownList ID="radDropDownSubCat" runat="server"> </telerik:RadDropDownList> </td> </tr> <tr> <td> Enter Meddra Code : <telerik:RadDropDownList ID="radDropDownMeddra" runat="server"> </telerik:RadDropDownList> </td> </tr> <tr> <td> <asp:Button ID="btn_SaveEditReturnItem" runat="server" Text="Submit" OnClick="btn_SaveEditReturnItem_Click" /> <asp:Button ID="btn_EditReturnItemCancel" runat="server" Text="Cancel" /> <br /> <br /> <br /> </td> </tr> <tr> <td> <br /> <br /> <br /> </td> </tr> </table> <br /> <br /> <center> </center> <asp:Button ID="btn_Hidden1" runat="server" Style="display: none" /> </aspanel> </form></asp:Content>\[/code\]