I need to make an Ajax request to a flash file

Normally it would be something like this (flashcontent.php)
Code:
<div id="flashContent">No flash player</div>
<script type="text/javascript">
   var so = new SWFObject("myFlash.swf", "myFlash", "750", "300", "7", "FFFFFF");
   so.write("flashContent");
</script>
this works

Now I make a request
Code:
<div id="content"></div>

<a href="javascript:makeRequest('flashcontent.php','content')">test flashcontent in ajax div</a>
somehow the div flashcontent isn't being replaced by the swf???