How to change axWindowsMediaPlayer uiMode on mouse-move event and hide automatically after a few seconds

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C#

C#4.0

I have write following code in order to show media player control on mouse move event but when i double click to make it in full screen mode it show uiMode="fill" type controls and nothing happens on mouse move...

bool WindowsStateMax = false;
int playerUICount = 0;

private void axWindowsMediaPlayer1_DoubleClickEvent_1(object sender, AxWMPLib._WMPOCXEvents_DoubleClickEvent e)
        {
            if (WindowsStateMax == false)
            {
                this.WindowState = FormWindowState.Maximized;
                axWindowsMediaPlayer1.Dock = DockStyle.Fill;
                axWindowsMediaPlayer1.uiMode = "none";
                WindowsStateMax = true;
            }
            else if (WindowsStateMax == true)
            {
                this.WindowState = FormWindowState.Normal;
                axWindowsMediaPlayer1.Dock = DockStyle.None;
                axWindowsMediaPlayer1.uiMode = "none";
                WindowsStateMax = false;
            }
        }


private void axWindowsMediaPlayer1_MouseMoveEvent(object sender, AxWMPLib._WMPOCXEvents_MouseMoveEvent e)
        {
            if (WindowsStateMax == true)
            {
                axWindowsMediaPlayer1.uiMode = "full";
                timerPlayerUI.Start();
                playerUICount = 0;
            }
            else
            {
                // do nothing
            }
        }


private void timerPlayerUI_Tick(object sender, EventArgs e)
        {
            playerUICount++;
                if(playerUICount==30)
                {
                    axWindowsMediaPlayer1.uiMode = "none";
                    playerUICount = 0;
                    timerPlayerUI.Stop();
                }
        }

what's wrong with above code???