Windows media player problem

[C# Programming]

my application is windows based (C#.net)

i have two forms both containing a windows media player
i go to first form(Form 1) and start a file in media player now if i go to second form and start a file in media player there also , the media player in form 1 should stop

how will i achieve this??

i have tried all the methods but nothing have worked like

Test ts = new Test(); [First Form]

ts.axWindowsMediaPlayer1.Stop();


ts.axWindowsMediaPlayer1.settings.volume=0;
ts.axWindowsMediaPlayer1.Dispose();
ts.axWindowsMediaPlayer1.currentPlaylist.clear();
ts.axWindowsMediaPlayer1.close();[Error-com object that has been seperated from its underlying RCW cannot be used]

plzz help