Mystique theme problem please help!

The sections ‘about the author’, ‘related posts’ and ‘pings’ in the bottom of single post pages don’t work (don’t open). Recently I added a email subscription form into the single post template (single.php), but I don’t think it is the one that causes this problem, because when I tried to remove it, they still didn’t work.
Here is an example:

http://www.learning-mind.com/8-wrong-things-we-learnt-at-school/

For example, when I push the ‘about the author’ button, nothing changes on the page, and the link shows like that:

http://www.learning-mind.com/8-wrong-things-we-learnt-at-school/#about-the-author

What could be the cause for this problem? Please help me, because I have no idea how to fix it =(