My color animation does not seem to be working in FireFox but it seems to be working fine in IE8. My firefox version is 3.6.8. Here is my html

<title>Color Animation</title>
<script src="../lib/jquery-1.4.2.min.js" type="text/javascript" charset="utf-8"></script>
<script src="../lib/jquery.color.js" type="text/javascript" charset="utf-8"></script>
<script type="text/javascript" src="colorAnimation.js"></script>
<div id='disclaimer'>
This is a disclaimer that will be animated.
here is my jquery code
$('#disclaimer').animate({'backgroundColor': 'red'}, 2000);
This jquery version : jquery-1.4.2.min.js
This is the jquery color plugin version: jquery.color.js(version 1.0)

Please tell me what went wrong?