AddThis

firefox changes the addthis code/

I have placed the addthis code on http://www.zimbabwesituation.com/ immidiately above the days news items _line 1444. It shows up peerfectly in Internet Explorer but in Firefox it is invisible. When I look at the source I see that Firefox has STRIPPED the code bare and renders it as <div class="addthis_toolbox addthis_default_style addthis_32x32_style">
<a class="addthis_button_preferred_1"></a>
<a class="addthis_button_preferred_2"></a>
<a class="addthis_button_preferred_3"></a>
<a class="addthis_button_preferred_4"></a>
<a class="addthis_button_compact"></a>
<a class="addthis_counter addthis_bubble_style"></a>
</div>
without even the comments at beginning and end!!!!

How can I remedy this?