ถามเรื่อง statusstrip properties text ไม่เปลี่ยนตรงที่ตั้งไว้

private void btnStart_Click(object sender, EventArgs e)
        {
            Cursor.Current = Cursors.WaitCursor;
            btnStart.Enabled = false;
            btnClose.Enabled = false;
            toolStripStatusLabel1.Text = "Please wait...";
            try
            {
                if (Listfolder.Items.Count != 0)
                {
                    foreach (string Dir in Listfolder.Items)
                    {
                        string newSource;
                        string newDest;
                        newSource = string.Concat(txtSource.Text, "\\", Dir);
                        newDest = string.Concat(txtDest.Text, "\\", Dir);
                        if (!Directory.Exists(newSource))
                        {
                            MessageBox.Show("No folder  " + newSource + "  in the source!", "Message", MessageBoxButtons.OK, MessageBoxIcon.Error);
                            //continue;
                        }
                        else
                        {
                            ClassCopy HasListBoxCopy = new ClassCopy();
                            HasListBoxCopy.CopyFolder(newSource, newDest);
                        }
                    }
                    Cursor.Current = Cursors.Default;
                    btnStart.Enabled = true;
                    btnClose.Enabled = true;
                    toolStripStatusLabel1.Text = "Ready";
                    MessageBox.Show("Copy files complete!", "Message", MessageBoxButtons.OK, MessageBoxIcon.Information);
                }
                else
                {
                    ClassCopy NotHasListBoxCopy = new ClassCopy();
                    NotHasListBoxCopy.CopyFolder(txtSource.Text, txtDest.Text);
                    Cursor.Current = Cursors.Default;
                    btnStart.Enabled = true;
                    btnClose.Enabled = true;
                    toolStripStatusLabel1.Text = "Ready";
                    MessageBox.Show("Copy files complete!", "Message", MessageBoxButtons.OK, MessageBoxIcon.Information);
                }

            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
            
        }

toolStripStatusLabel1.Text = "Please wait..."; 
Application.DoEvents();