wmv file not working in Firefox 3.0.3, Its working fine in IE

document.getElementById("QuestionMedia").innerHTML +=
  '<OBJECT ID="MediaPlayer" WIDTH="350" HEIGHT="280" CLASSID="CLSID:22D6F312-B0F6-11D0-94AB-0080C74C7E95"STANDBY="Loading Windows Media Player components..." TYPE="application/x-oleobject">' +
    '<PARAM NAME="FileName" VALUE="video/' + Question.Media + '">' +
    '<PARAM name="autostart" VALUE="false">' +
    '<PARAM name="ShowControls" VALUE="true">' +
    '<param name="ShowStatusBar" value="false">' +
    '<PARAM name="ShowDisplay" VALUE="false">' +
    '<EMBED TYPE="video/x-ms-wmv " SRC="video/' + Question.Media + '" NAME="MediaPlayer" WIDTH="350" HEIGHT="280" ShowControls="1" ShowStatusBar="0" ShowDisplay="0" autostart="1"> </EMBED>' +
  '</OBJECT>';

<embed src="/media/video.wmv">

<embed src="http://mysite.com/media/video.wmv">