Record from database did not display on Datagridview

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlClient;

namespace CIMBCashFlowApp
{
    public partial class MainMenu : Form
    {
        public MainMenu(string loginType)
        {
            InitializeComponent();
            FillData();
        }

        private void FillData()
        {
            using (SqlConnection con = new SqlConnection
                (Properties.Settings.Default.CIMBFlexiLoanDatabaseConnectionString))
            {
                con.Open();
                using (SqlDataAdapter data = new SqlDataAdapter("SELECT * FROM CIMBFlexiLoanTBL", con))
                {
                    DataTable tbl = new DataTable();
                    data.Fill(tbl);
                    dataGridView1.DataSource = tbl;
                }
            }
        }
    }
}