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help with c#.net log in webform using ms access

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I am trying to build a simple login form on an existing website I am getting these errors:
txtUser does not exist in the current context
txtPass does not exist in the current context
Literal1 does not exist in the current context

I will paste below first the form, then the codebehind

form
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="logIn.aspx.cs" Inherits="WebApplication1._Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
     New users can <a href="CarrierRegistration.aspx">register</a> here.<br />
   
    <table  border="0" style="border-width: 3px; border-color:#c2c2c2;
border-style: solid;">  
   <tr>
   <td></td>
   <td><strong>Please Login</strong></td></tr>
    <tr>
    <td>
        <asp:Label ID="lblUser" runat="server" Text="Username:"></asp:Label>
    </td>
    <td>
        <asp:TextBox ID="txtUser" runat="server"></asp:TextBox>
    </td></tr>
    <tr>
    <td>
        <asp:Label ID="lblPass" runat="server" Text="Password:"></asp:Label>
    </td>
    <td>
        <asp:TextBox ID="txtPass" runat="server"></asp:TextBox>
    </td></tr>
    <tr>
    <td></td>
    <td>
       
    </td></tr>
    <tr>
    <td></td>
    <td> <asp:Button ID="btnLogin" runat="server" Text="Login" 
            onclick="btnLogin_Click" /></td></tr>
    <tr>
    <td>
        <asp:Literal ID="Literal1" runat="server"></asp:Literal>
    </td></tr>
    
    </table>
    
    </div>
    </form>
</body>
</html>


Codebehind
using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Data.OleDb;


namespace WebApplication1
{
    

    public partial class _logIn : System.Web.UI.Page
    {
       

        protected void Page_Load(object sender, EventArgs e)
        {

        }
        protected void btnLogin_Click(object sender, EventArgs e)
        {
            

            string connect = "Provider=Microsoft.Jet.OleDb.4.0;Data Source=C:\\Users\\Christie\\Desktop\\WebApplicatio
n1\\App_Data\\prosearchusers.mdb";
            string query = "Select Count(*) From tblCustRecords Where username = '" & txtUser & "' And [password] = '" & txtPass & "'";
            int result = 0;
            using (OleDbConnection conn = new OleDbConnection(connect))
            {
                using (OleDbCommand cmd = new OleDbCommand(query, conn))
                {
                    cmd.Parameters.AddWithValue("Cust_Name", txtUser);
                    cmd.Parameters.AddWithValue("Cust_Password", txtPass);
                    conn.Open();
                    Session["User"] = txtUser;
                    result = (int)cmd.ExecuteScalar();
                }
            }
            if (result > 0)
            {
                Response.Redirect("LoggedIn.aspx");
            }
            else
            {
                Literal1 = "Invalid login";
            }

        }
    }
}


Can someone please help me, I really do not have much experience in .net programming

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