hi,
Image SWAP functionality is a future of
Flexible Zoom Effect v4
CleanMart uses the Zoom Effect v3
This is why the IMAGE SWAP functionality doesn't work.
We have completely redeveloped the Zoom Effect extension (v3 and v4 are completely different). It is more light-weight, works better and offer more advanced features for customizations.
For more info about: Flexible Zoom Effect v4, visit:
www.flexiblewebdesign.com/Virtuemart-Modules/Virtuemart-Zoom-Effect-Plugin
regards.
Support