my first wp website… please help!

Hi all,

I just have a small question which I’m hoping is easy to resolve. I’ve just built my first wordpress site – http://milliebeasvintage.com/

If you take a look, you will see there is only a small strip of the tiled background image behind the white header. I want to nudge things down a little so more of the background becomes visible. When I try to do this with Firebug, there’s no problem… I see this:

#container {
-moz-background-clip:border;
-moz-background-inline-policy:continuous;
-moz-background-origin:padding;
background:#FFFFFF none repeat scroll 0 0;
border:1px solid #CCCCCC;
margin:20px auto;
overflow:hidden;
text-align:left;
width:1060px;

I simply change the margin from 20px to 90px, and get the look I want. But when I try to modify the actual stylesheet, I see this:

#container {
background: #FFFFFF;
width: 1060px;
text-align: left;
margin: 20px auto 20px auto;
border: 1px solid #cccccc;
overflow: hidden;
}

When I change the margins here, nothing happens. I’d really appreciate any and all suggestions.

Thanks,
Stephanie