Logged-in User appears in Main Form C#

Question

Good afternoon!!!

I have a problem that I don’t know why... I have a program in a Windows Forms C#. It has a Login window that goes into a Main window. I use the same principle of storing the logged-in user session and searching during the running application. And it works because it stores this user in the database at any time I perform the function. But if I ask to show this user on a label or textbox in the window, it does not appear!!! And the interesting thing is that if I put a button in the main window to open a child form and put exactly the SAME CODE in the child form, the said whose user appears... It’s like the main form doesn’t allow it... Can anyone tell me where I’m going wrong?

"Login class"

public class LoginSenha

{
    public static string AUsuario = "";
    public static string ANOME = "";
}

"Form Login" - event click to login

private void btnAcessar_Click(object sender, EventArgs e)    
        {
        OleDbConnection con = new OleDbConnection();
        con.ConnectionString = @"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=R:\Projetos\Unilever\Software\DataBase_Knorr.accdb";
        con.Open();
        OleDbCommand cmd = new OleDbCommand("SELECT Usuario, SENHA FROM USUARIOS WHERE Usuario='" + lblUser.Text + "'and SENHA='" + txtSenha.Text + "'", con);
        OleDbDataAdapter da = new OleDbDataAdapter(cmd);
        DataTable dt = new DataTable();
        da.Fill(dt);
        if (dt.Rows.Count > 0)
        {
            frm_Fabrima frl = new frm_Fabrima();
            frl.Show();
            this.Visible = false;

            LoginSenha.AUsuario = lblUser.Text;
            LoginSenha.ANOME = lblNOME.Text;

            usuarioConectado = lblUser.Text;

        }
        else
        {
            MessageBox.Show("Usuário/Senha Incorretos");
        }
        con.Close();
    }

"Form Principal"

...No Form_load...

 private void frm_Fabrima_Load(object sender, EventArgs e)
{
        inicializar();

        CarregaSKU();

        txtOrdemProducao.Focus();

        cbSKU.Text = "";

        lblConectado.Text = frm_Login.usuarioConectado;

        lblConectado.Text = LoginSenha.ANOME.ToString();

        rbBartelt1.Checked = true;
    }

From what you’ve seen, I’ve tried two ways to try and look