Identifier expedted problem

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ASP.NET4

Hi everybody, i jus started a new project and something makes me crazy. The problem is that when i put a tool my aspx file and save it my related designer.aspx.cs file's identifier, namely namespace getting lost i tried everything and never succeeded =( pls help me i can not make any progress and time is goin on.


I wanna explain my problem with my code;

i am trying to create Doctors.aspx file;

<%@ Page Language="C#" MasterPageFile="~/Site.master" AutoEventWireup="true" CodeBehind="Doctors.aspx.cs" %>

<%@ Register Assembly="DevExpress.Web.ASPxEditors.v10.1, Version=10.1.5.0, Culture=neutral, PublicKeyToken=940cfcde86f32efd"
    Namespace="DevExpress.Web.ASPxEditors" TagPrefix="dx" %>
<asp:Content ID="HeaderContent" runat="server" ContentPlaceHolderID="HeadContent">
</asp:Content>
<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent">

</asp:Content>

when i put sth. on my Doctors.aspx code and save it;

<%@ Page Language="C#" MasterPageFile="~/Site.master" AutoEventWireup="true" CodeBehind="Doctors.aspx.cs" %>

<%@ Register Assembly="DevExpress.Web.ASPxEditors.v10.1, Version=10.1.5.0, Culture=neutral, PublicKeyToken=940cfcde86f32efd"
    Namespace="DevExpress.Web.ASPxEditors" TagPrefix="dx" %>
<asp:Content ID="HeaderContent" runat="server" ContentPlaceHolderID="HeadContent">
</asp:Content>
<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent">
    <asp:View ID="placeView" runat="server">
    </asp:View>
</asp:Content>

my Doctors.designers.aspx.cs file's namespace got lost =( like:

//------------------------------------------------------------------------------
// <auto-generated>
//     This code was generated by a tool.
//
//     Changes to this file may cause incorrect behavior and will be lost if
//     the code is regenerated.
// </auto-generated>
//------------------------------------------------------------------------------

(There should be a namespace)

public partial class (There should be a identifier) {

    /// <summary>
    /// placeView control.
    /// </summary>
    /// <remarks>
    /// Auto-generated field.
    /// To modify move field declaration from designer file to code-behind file.
    /// </remarks>
    protected global::System.Web.UI.WebControls.View placeView;
}

Any answer will greatfully accepted. Thanks for everyone...