No audio when hint comes up

I just started on lingq. I am learning chinese. The audio works fine when i use the player. However, when i click on a yellow word and the hint pops up, there is a small audio button that i press and nothing happens. It should pronounce the word, right? I am using internet explorer 9.0. Thanks.

There are some bugs with text-to-speech in IE. A fix should be out relatively soon, but in the meantime you can also try Firefox or Chrome, as text-to-speech should be working fine for these two browsers.