ARRRRGGGGHHHHHHHH...

WHY won't netscape show me background colour?

Here is my code:

Code:
<div id="box">ssklajdas</div>

---------------------------------------

#box {	
	background-color:	             #99CCFF;
	layer-background-color:	#99CCFF;
}
It works fine in IE, and the W3C validators have marked both my CSS and HTML as perfect. What's wrong?