Hmmmm good effect needs tweaking for IE (Bottom bar)

Iv made a little bar for my website. Here is an example:

http://www.thelocalforum.co.uk/files/test.php

It works a treat in FF but in IE it gets all jerky when scrolling up and down. Is there any way to make it smoother?

here is the code im using:

<!-- Original Code: http://www.howtocreate.co.uk/fixedPosition.html -->
<!-- Snippet With Example: http://code.dreamincode.net/snippet370.htm -->
 
<!-- CSS with support for IE -->
<style type="text/css">
 
<!--
#fixme {
     /* IE 5.0/Win and other lesser browsers will use this */
     position: absolute; right: 0px; bottom: 0px;
 
}
body > div#fixme {
     /* used by Netscape6+/Mozilla, Opera 5+, Konqueror, Safari, OmniWeb 4.5+, ICEbrowser */
     position: fixed;
}
--></style>
<!--[if gte IE 5.5]>
<![if lt IE 7]>
<style type="text/css">
div#fixme {
     /* IE5.5+/Win - this is more specific than the IE 5.0 version */
     right: auto; bottom: auto;
     left: expression( ( -0 - fixme.offsetWidth + ( document.documentElement.clientWidth ? document.documentElement.clientWidth : document.body.clientWidth ) + ( ignoreMe2 = document.documentElement.scrollLeft ? document.documentElement.scrollLeft : document.body.scrollLeft ) ) + 'px' );
     top: expression( ( +0 - fixme.offsetHeight + ( document.documentElement.clientHeight ? document.documentElement.clientHeight : document.body.clientHeight ) + ( ignoreMe = document.documentElement.scrollTop ? document.documentElement.scrollTop : document.body.scrollTop ) ) + 'px' );
}
</style>
<![endif]>
<![endif]-->
 
<!-- HTML CODE FOR ACTUAL BANNER -->
<div id="fixme" style="height: 120px; width: 100%;">
   <!-- EDIT BANNER CONTENTS BELOW -->
   <div style="z-index: 100000; background: url(http://www.url/catfish_tile2.gif); width: 100%; height: 120px;">
      <div style="float: left; position: relative; left: 0; top: 0;"><a href="http://www.url/register.php"><img src="http://www.url/catfish2.gif" height="120" border="0"></a></div>
      <div style="float: right; position: relative; text-align: right; top: 75px; font-size: 10px; font-weight: bold;"><a onClick="hiderow('fixme');return true;" style="cursor: pointer;"><font color="White">Close Me</font></a></div>
      <div style="float: center; position: relative; top: 80px; text-align: center; font-size: 12px; font-weight: bold; font-style: italic;"><a href="http://www.url/"><font color="white">If you are not of the legal age to view adult content</font><br><font color="white">please leave immediatly!</font></a></div>
   </div>
</div>

PHP:

Any tips? Thanks!