AddThis

Vkontakte Like

Hello! How to add vkontakte like to my widget. This is my code:
<!-- AddThis Button BEGIN -->
<div class="addthis_toolbox addthis_floating_style addthis_counter_style" style="left:0px;top:195px;">
<a class="addthis_button_facebook_like" fb:like:layout="box_count" fb:like:locale="en_US"></a>
<a class="addthis_button_tweet" tw:count="vertical"></a>
<a class="addthis_button_google_plusone" g:plusone:size="tall"></a>
<a class="addthis_counter"></a>
</div>
<script type="text/javascript">var addthis_config = {"data_track_addressbar":true};</script>
<script type="text/javascript" src="http://s7.addthis.com/js/250/addthis_widget.js#pubid=ra-4f885f7e63e1f3d4"></script>
<!-- AddThis Button END -->