Quick and simple CSS question on borders

[HowlingWulf]

Well this *should* be simple... for someone.

I'm trying to set a wrapper class with a 20px left/right blue border, but it's not working. Can anyone spot the issue?

<style type="text/css">
.wrapper {
width: 1000px;
font-size:24px;
text-align: center;
border-left-color:blue;
border-right-color:blue;
border-left-width:20px;
border-right-width:20px;
margin: 0 auto;
background:#aa2211;
}
</style>

The test page is http://www.howling-wulf.com/test.htm