i have a form with ultra toolbar manager(including ribbon). for certain ribbon buttons the click event suppose to show a message box to the user but  it takes 15 second or so to display the message box. This happens only when the windows theme is set to classic theme it works fine in the windows xp theme. This problem of message boxes appearing delay span through out my application for forms which have a ultratool bar manager control.

I'm using infragistics winforms 2008 version 2

 private void ultraToolbarsManager1_ToolClick(object sender, Infragistics.Win.UltraWinToolbars.ToolClickEventArgs e)
        {
            switch (e.Tool.Key)
            {
                case "ButtonTool1":    // ButtonTool
                    // Place code here
                    MessageBox.Show("this is a test");
                    break;

            }

        }

please advice