Mozilla - IFRAME troubles

This is actually my first venture into using IFRAMES. The client wanted a
site that was visually stimulating, and the design I came up with is fixed
width. I am using an IFRAME to display the "news" articles for the site.
In IE, everything works beautifully, however in FireFox, all I get is a
blank space where the iframe should be.

My code for the iframe is this:

<iframe width="100%" height="100%" src="./news.php" ></iframe>

The iframe field should stretch itself the entire length of the table cell
it's in, and scroll if content is larger than area.

The testing URL is:

http://72.29.68.184/~heromyt/

Thanks to anyone that can shed some light on this.

Greg