ASP.Net Label is not displaying when set using QueryString value

sir i am passing a value of username from from web1.aspx to wardno171.aspx using query string.

on the wardno171.aspx page i am accepting this value in a label.

how can i display the text of this label(Label1) in marquee tag

please reply

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;


public partial class wardno171 : System.Web.UI.Page
{
    
    protected void Page_Load(object sender, EventArgs e)
    {
        
       Label1.Text = Request.QueryString["ab"].ToString();
}
}