Just not working

Fairly new to this game but got loads of Joomla back end experience. A new Zencart with cambridge_pro template (which shouldn't matter?).

I have installed as per readme, no errors, enabled in Config_Images.

When I move the mouse around the site, in and out of different categories, yet I still only get the finger and no magnified image!

Under Tools_Image Hander I can select each product and the images for the larger size are bigger.

It is just not reflected on the site.

Cheers for any info.