CSS Layout

Hello,

I am trying to float a Google ad to the right of my logo:

http://www.historicmelbournerealestate.com/

For some reason I can't get it to position inline to the right of my logo.

Seems there is a span class that is filling the logo row and making the Google ad drop down? I can't find where to adjust the width on span12.

Here is my CSS:

.google {
width:728px;
float:right;
}

Any help would be greatly appreciated!

Thanks!

Ben