You bought the Fancy Product Slider only.
What "product slider" does is sliding products. That's it.
Once you clicked the product in the "fancy slider" DEMO, it has brought you to a different place where we demonstrate our Zoom Effect extension,
which can be purchased through here:
www.flexiblewebdesign.com/Virtuemart-Extensions/Flexible-Virtuemart-Zoom-Effect-on-Product-Page
Our Zoom Effect doesn't come with the Fancy Slider Extension though, they are completely different extensions so they are sold separately.
Please read the product descriptions carefully and be aware what you are purchasing.
Regards.
Forum Support.