box ala blockquote

Hi I have added this to my style.css in my template directory

. boxed {
border: medium solid black;
border-width: thin;
background-color: lightgrey;
padding: 3px;
}

Then I've made a button with

<div class="boxed">%TEXT%</div>

- But it doesn't work - Could anybody please tell me what I'm doing wrong?

Thanx in advance