Banner Link not working

Hi, not sure if you can help with this one.
I have insterted banners into my pages and posts with code supplied by merchants I’m connected with.
The problem is, if I try to link the code to an image the link doesn’t seem to work (The page doesn’t change).
If I right click the image and open in a new page then the link works. Really strange.
The link also works if I simply apply it to text.
I’ve tested on other machines/browsers and the same problem exists.
Here is one of the pages I’m having problems with:
http://footballbootsreview.com/where-to-buy/
If you see the banners don’t work so I’ve had to also add text below to link through to the merchant.

Any help would be greatly appreciated.