Message not getting displayed

Hi

  Login is getting loaded but not showing message . Below are the Forms

static class Program
{
    /// <summary>
    /// The main entry point for the application.
    /// </summary>
    [STAThread]
    static void Main()
    {
        Application.EnableVisualStyles();
        Application.SetCompatibleTextRenderingDefault(false);
        Application.Run(new Login());
    }
}


public partial class Login : Form
{
    SqlCommand cmd;
    SqlConnection cn;
    SqlDataReader dr;
    public Login()
    {
        InitializeComponent();
    }

    private void Login_Load(object sender, EventArgs e)
    {
        MessageBox.Show("connecting with sql server");
        SqlConnection cnn = DatabaseConnection.GetInstance();

        //execute queries
        string query = "SELECT * FROM Login";
        
        SqlCommand command = new SqlCommand(query, cnn);
        cnn.Open();
        DataSet ds = new DataSet();

        MessageBox.Show("connect with sql server");

    }

    private void Btnregister_Click(object sender, EventArgs e)
    {
        //this.Hide();
        ////Registration registration = new Registration();
        //registration.ShowDialog();
    }

}

Thanks