login ด้วย usercontrol แล้ว logout ไม่ได้ครับช่วยทีครับ Web (ASP.NET), C#

public partial class logout : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        Session.Abandon();
        Session["strUser"] = "";
        Session.Clear();
        Session.RemoveAll();
        Response.Redirect("../home.aspx");
    }
}

protected void Page_Load(object sender, EventArgs e)
    {
        if (Session["strUser"] != "")
        {
            Panel1.Visible = false;
            panel2.Visible = true;
            this.Label1.Text = "Welcome [" + Session["strUser"] + "]";
        }
        else
        {
            Panel1.Visible = true;
            panel2.Visible = false;
        }
          
    }


    protected void btnLogin_Click1(object sender, EventArgs e)
    {
        SqlConnection objConn = new SqlConnection();
        SqlCommand objCmd = new SqlCommand();
        string strConnString;
        String strSQL;
        int intNumRows = 0;

        //*** Open Connection ***'
        strConnString = "Server=localhost;Uid=sa;PASSWORD=1234;database=projecttest;Max Pool Size=400;Connect Timeout=600;";
        objConn = new SqlConnection();
        objConn.ConnectionString = strConnString;
        objConn.Open();

        //*** Check Login **
        strSQL=" SELECT COUNT(*) FROM [User] WHERE Username = @sUsername AND Password = @sPassword ";
        objCmd = new SqlCommand(strSQL.ToString(), objConn);
        objCmd.Parameters.Add("@sUsername", SqlDbType.VarChar).Value = this.txtUsername.Text;
        objCmd.Parameters.Add("@sPassword", SqlDbType.VarChar).Value = this.txtPassword.Text;
        intNumRows = Convert.ToInt32(objCmd.ExecuteScalar());

       
        if (intNumRows > 0)
        {
            Session["strUser"] = this.txtUsername.Text;   
        }
        else
        {
            this.lblStatus.ForeColor = System.Drawing.Color.Red;
            this.lblStatus.Text = "Username or Password wrong!";
        }
        objConn.Close();
        objConn = null;
    }

}