[CSS] Simple Positioning

I’m trying to make a DIV for a left side navigation. In Firefox, it looks like what I want. In Internet Explorer, it does not display the way I want. How do I fix this?

CSS


#left {
	background: url(interface/leftBG.gif);
	width: 173px;
	position: absolute;
	top: 50px;
	bottom: 20px;
}

HTML


<body>
<div id="left">
	left
</div>
</body>

Firefox

Internet Explorer