padded borders for pix

Hi everyone,

i’m trying to style my pics with a padded border and before i used this in my css and it worked fine

.cam {
background: #FFF;
padding: 4px;
border: 1px solid #000;
}

and placed this in my images:
<img src=”file.png” class=”cam” />

but now for some reason on my new layout it doesn’t work =(
and it just gives me room around my pics but i don’t get the padded border. i don’t know what’s wrong or how to fix it. Someone please help!! my url is: http://www.diorable.net if you want to take a look.