Where does the digg code go that gives an option to submit and digg for each write up

Example site 360wtf.com

I want to set that up on xtremecarforum.com, so on every write up a digg option is there.

 

Thank you!! *Hugs*

 

<?php if(function_exists('digg_this')) { digg_this('C0C0C0', 'compact', 'position: relative; top: 20px;', ''); } ?>

Code (markup):

I am putting this in and it isn't changing the color of my dig button?