WMP and Rails

I wrote a basic little app to allow me to play tunes from WMP on my PC
via Rails on my PocketPC. I select a tune, click play and the tune
plays until I hit the back button and playback stops! some of the code
below. Any Ideas why playback stops?

TIA

Mike

def PlayItem
i = params[:id]
@it = @@wmp.currentPl.item(i)
@@wmp.volume = 50
@@wmp.currentmedia = @it
Play()

redirect_to :back

end

##Controller code
def PlayList
i = params[:id]
@nl = @pl.item(i)
@@wmp.volume = 50
@@wmp.currentPl = @nl
@@wmp.currentmedia = @@wmp.currentPl.item(1)
redirect_to :back
Play()
end

def Play
sleep(1)
$wmp.play
end

class WMPlayer

@@oPlayer = nil
@@oControls = nil
@@oCurrentPL = nil
@@oPlayListCollection = nil

def initialize
	if not @@oPlayer
		@@oPlayer = WIN32OLE.new("WMPlayer.ocx.7")
	end
	@@oPlayer
end
def currentmedia= oObj
	@@oPlayer.currentmedia = oObj

end
def play
	if @@oControls.isAvailable "play"
		@@oControls.play
	else
		@@oControls.playItem @@oControls.currentItem
	end
end

end

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