statusbar stops responding

private const int MIN_VALUE = 0;
private const int MAX_VALUE = 300;
private const int DEFAULT_VALUE = 100;


public void SliderPaneClick(XtremeCommandBars.StatusBarSliderPane pane,
                            XtremeCommandBars.XTPSliderCommand command,
                            int pos)
{
    System.Diagnostics.Debug.WriteLine(string.Format("cmd: {0}, pos: {1}, pane: {2}", command.ToString(), pos, pane.ToString()));

    int newvalue = pos;

    switch (command)
    {
        case XtremeCommandBars.XTPSliderCommand.XTP_SB_LEFT:
            newvalue = MIN_VALUE;
            break;
        case XtremeCommandBars.XTPSliderCommand.XTP_SB_RIGHT:
            newvalue = MAX_VALUE;
            break;
        case XtremeCommandBars.XTPSliderCommand.XTP_SB_LINELEFT:
            newvalue = Math.Max(MIN_VALUE, pane.Value - 10);
            break;
        case XtremeCommandBars.XTPSliderCommand.XTP_SB_LINERIGHT:
            newvalue = Math.Min(MAX_VALUE, pane.Value + 10);
            break;
        case XtremeCommandBars.XTPSliderCommand.XTP_SB_THUMBTRACK:
            newvalue = pos;
            break;
        case XtremeCommandBars.XTPSliderCommand.XTP_SB_PAGELEFT:
            newvalue = Math.Max(MIN_VALUE, pane.Value - 30);
            break;
        case XtremeCommandBars.XTPSliderCommand.XTP_SB_PAGERIGHT:
            newvalue = Math.Min(MAX_VALUE, pane.Value + 30);
            break;
        default:
            System.Diagnostics.Debug.WriteLine(
                string.Format("strange value: cmd: {0}, pos: {1}", command.ToString(), pos));
            return;
    }

    if (newvalue != pane.Value)
    {
        pane.Value = newvalue;
        CommandBars.StatusBar.FindPane(1).Text = newvalue + "%";
    }
}

private void Form1_Load(object sender, EventArgs e)
{
    XtremeCommandBars.StatusBar sb = CommandBars.StatusBar;
    sb.AddPane(0);

    XtremeCommandBars.StatusBarPane p = sb.AddPane(1);
    p.Width = 40;
    p.Alignment = XtremeCommandBars.XTPTextAlignment.xtpAlignmentRight;
    p.Text = DEFAULT_VALUE + "%";

    XtremeCommandBars.StatusBarSliderPane slider = sb.AddSliderPane(2);
    slider.Min = MIN_VALUE;
    slider.Max = MAX_VALUE;
    slider.Value = DEFAULT_VALUE;
    slider.Width = 150;
    slider.SetTicks(DEFAULT_VALUE);
    sb.SliderPaneClick += SliderPaneClick;
    sb.Visible = true;

}