Development CSS Background image

I'm trying to get a background image to fill the whole of a column, instead of appearing just to the end of the text within the column.

Here's the HTML file and here's the CSS.

Any ideas how I get the whole of the image to appear, instead of just a portion of it? I've tried calling the image within the HTML and changing the Z index to -1, but the positioning was a nightmare. So I'd like to have it as a background image...

 

Specify a minimum height.

 

Thanks! I awoke this morning and I thought the exact same thing - proves that sleeping on something works.

 

Thanks for the tip, I specified a width originally, but completely forgot about height. Odd I know. And so far it's validating CSS, XHTML Strict, WAI etc. and IE likes it.