Aligning video right

I’m trying to align the video to the right of this page:

I tried adding to my CSS file:

 #content-rightbox {
    display: block;
    float: right;
    width: 250px;
    height: 205px;

and the following HTML

<div id="content-rightbox"><iframe width="250" height="205" src="" frameborder="0" allowfullscreen></iframe></div>

It’s not working. What am I missing?

I checked your site in IE7/8/9, Firefox, Chrome and Safari and it’s floated to the right for me, try clearing your browser cache as the CSS file may be still stored for you.

Terrific! Many thanks.