update Window media player Param

Question

I added a WMP to my page as follow:

 <object id="mPlayer" classid="clsid:6BF52A52-394A-11D3-B153-00C04F79FAA6" type="application/x-oleobject">
        <embed name="mPlayer" pluginspage="http://www.microsoft.com/Windows/MediaPlayer" />
    </object>

with IE in page ready event i check the $('#mPlayer').html();and it has generated all default param for IE such as:

<PARAM NAME="URL" VALUE="">
<PARAM NAME="rate" VALUE="1">
<PARAM NAME="balance" VALUE="0">
----- etc

I would like to add a value for the URL PARAM. if i add a new PARAM it does not change the default value. I tried to get $('PARAM','#mPlayer'), but it returns 0 item. Any help would be greatly appreciated.