bufferlength in flashvars

How can I set my bufferlength in my .flv file. Here is my code:

<script type="text/javascript">
var FO = { movie:"https://media.dreamhost.com/mediaplayer.swf",width:"320",height:"240",majorversion:"7",build:"0",bgcolor:"#FFFFFF",
flashvars:"file=http://www.daimlerfinancialservicesusa.com/Tiger_Woods_320x240.flv&showdigits=true&autostart=true" };
UFO.create(FO,"Tiger_Woods_320x240.flv");
</script>

I thought all I would have to do is add a "&bufferlength=10" at the end of the .flv filename