Images not appearing in header.php

Hello,

I am running a template on the site test.taramillernutrition.com

When using firebug you can see that inside my header, right after my logo div there is a div called .social

This housed my RSS info before, but have since taken out the code which read:

<div class="rss">Subscribe to our <a href="<?php bloginfo('rss2_url'); ?>">RSS</a></div>

and replaced with
<div class="social"> <img src="images/facebook.gif" width="39" height="40" /><img src="images/twitter.gif" width="39" height="40" /></div>

I tried creating a new div to see if that was the problem.

You can see a background colour on it, so I know it’s there, but I cannot get images to appear?

Any tips?

Thanks!!