Hi,
Because you are using Virtuemart 1.1.9
It has been almost 2 years that we have abandon the Virtuemart1.1.9 and releasing new extensions/templates for VM2.0.xx only.
Even Virtuemart officially stops supporting VM1.1.xx.
Since you are an old user, you must know that, the structure of VM1.1.xx and VM2.0.xx are completely different. The only similarity is their name. They are completely different Components, therefore their modules/extensions are also completely different. (this is why our Zoom Effect extensions comes with 2 different modules; One for VM1.1.xx and one for VM2.0.xx)
The new version (that has all the cool features; like different zoom types, Modal popup onClick etc.. ) is an extensions for VM2.0.xx. If you use our Zoom Effect extension with VM2.0.xx, you will see that everything is exactly the same as you see in the DEMO.
Regards,
Support