Help with adding my own social buttons without plugins

Hi,

I want to use my own buttons for the social networking on each post and I have been trying to add the links (like the ones below) to create my own Social buttons to my single.php. But it doesn’t matter what I do, they never show up. It’s like I never pasted anything at all. Is there any special place to paste these codes or what? I am missing something, but I don’t know what.

Codes like this:

<a href="http://del.icio.us/post?v=4&noui&jump=close&url=<?php the_permalink();?>&title=<?php the_title();?>"><img src="<?php bloginfo('template_directory'); ?>/images/delicious.png" alt="Bookmark on Delicious" /></a>

I created my own theme, maybe that’s the problem 🙂
This is my blog: http://www.pet-art.net/wordpress/

Thanks for any help I can get.