Floating Twitter-esque button in WordPress

I'm trying to do something like what is described here: http://wordpress.org/support/topic/how-can-i-make-this-please-look-inside-at-the-image?replies=9

(I'm not doing it for Twitter, but same concept.)

I've tried this, but no matter where I place the div, I can't get the button to go where I want it, and the CSS seems to be ignored.

Here's the HTML I'm using:

<div id=”login-register”> <a href=/search/#ShowLogin><img src=/wp-content/uploads/2011/01/Login-Register.png alt=”Login or Register” /></a> </div>

And the CSS:

#login-register {
	position: absolute;
	top: 200px;
	right:0;
}

Here's my test installation: http://intownelite.com/openhousetest/

The button labeled "Login / Register" is the one I'm working on. Placing the div in different spots in my header.php puts the button in different spots, but never does it align to the side of the browser as directed by the CSS. Seems like maybe it's stuck inside another div, but I can't seem to overcome this no matter where I place it.

Any suggestions?

thanks,
Mike