CSS, CSS + Help with Problem

Hi all, I have got a big question with this. I'm having some trouble, don't know if someone can help.

I have posted the code below.
Explanation: Hover over a link in and displays a hidden div. Pretty cool for navigation purposes.
It doesn't work I can get it to work with a class on the div but that isn't good as will be multiple

Working Code with Div hover

HTML

<link rel="stylesheet" href="styles/style.css">
<div class="information_popup_container">
<div>
	<ul>
<li><a href="#" class="hovertext">Hey!</a></li>
</ul>
</div>

What part of this technical help forum suggested it was appropriate to post an advert for your company, even if it was web development, although good developers know full well this is not permitted! Account suspended.