[Plugin: Digg Digg] Problem with social plugins

Hey, I recently installed a wordpress in my server and when I was trying to put some social boxes in the post meta data I noticed the Facebook share button was not showing up all the time, just in some posts, I don’t understand why.
I am using manual placement from Dig Dig plugin and here’s my code:

<div class="postmetadata">
					<ul class="index-social">
						<li><?php dd_fblike_xfbml_generate('Like Box Count') ?></li>
						<li><?php dd_twitter_generate('Normal','twitter_username') ?></li>
						<li><?php dd_google1_generate('Normal') ?></li>
						<li><?php dd_fbshare_generate('Normal') ?></li>
					</ul>
				</div>

Hope you can help me.

Regards

http://wordpress.org/extend/plugins/digg-digg/