Touchpad clicks, but doesn't register input

I have a Acer r7-371t.

A few weeks ago, I tried to swap the battery. However, the battery I bought was too thick, and the mouspad didn't make a click sound. So I inserted the old battery back, but now, I have this problem: The click sound works again. But there isn't always a input recognized.

What could be the problem? I have read other posts saying something with a screw etc. What can I do to fix this?