Trouble: Leaderboard Ad in my Header

Hoping to get a bit of help here… I’m still a bit of a CSS newb and am trying to get a leaderboard ad script nicely aligned in my header.
The script is inside my header.php file and is inheriting the #header class which is as follows:

#header{
	background:transparent;
	height:247px;
	width:1000px;
	margin:0px 0px 0px;
	padding:0;
	text-indent: 8px;
	vertical-align: bottom;
}

I want that leaderboard to be aligned to the bottom, but it just doesn’t seem to want to budge. I can align left and right, but not up or down.

Am I missing something obvious?

The test-site is here: https://www.takeoffyourboots.com

Thanks for any help!