Buttons are not clickable

Your plugin seems very nice, but unfortunately, I can’t click at all on the buttons that appear on my page:

http://www.achteminute.de/20131021/wudc-malaysia-2015-call-for-applications-for-deputy-chief-adjudicators/comment-page-1/#comment-2980

Can you help me with this problem?

http://wordpress.org/plugins/2-click-socialmedia-buttons/