playselected() in python !!!!

hello,

i use this code

playlist = xbmc.PlayList( xbmc.PLAYLIST_VIDEO )
playlist.clear()
playlist.add(url=str(turl[0]),listitem=tlistitem[0])
playlist.add(url=str(turl[1]),listitem=tlistitem[1])
xbmc.Player(xbmc.PLAYER_CORE_MPLAYER).play(playlist)
xbmc.Player(xbmc.PLAYER_CORE_MPLAYER).playselected(1)


the playselected() does not jump to the selected video i don't know why

BTW i'm using xbmc pre 11

pls help me