slow play mp4 format

Hello,
I setup my player to play an mp4 file (11mb) but it start after very long period , can you help me to start instantly ?

url
http://wecansavetheamazon.com/jwplayer/index.html

my config:
<script type='text/javascript'>
var so = new SWFObject('player.swf','ply','470','260','9','#');
so.addParam('allowfullscreen','true');
so.addParam('allowscriptaccess','always');
so.addParam('wmode','opaque');
so.addVariable('image','preview.jpg');
so.addVariable('file',' http://wecansavetheamazon.com/mp4s/OzzieZamu.mp4');
so.addVariable('skin','http://www.longtailvideo.com/jw/upload/overlay.swf');
so.addVariable('frontcolor','ffffff');
so.addVariable('lightcolor','cc9900');
so.addVariable('controlbar','over');
so.addVariable('stretching','exactfit');
so.addVariable('bufferlength', '1');
so.addVariable('smoothing', 'false');
so.write('mediaspace');
</script>

thanks