Hi,
z-index might be problematic in some templates, because template developer loves to give something like z-index:99999999999 to some elements (especially to main menu item). So, either the z-index of Zoom Effect's modal box should be increased, or template's z-index should be decreased to resolve this issue.
But it is good to hear that you solved it already. Thanks for updating your own topic.
Case solved, topic is closed
Regards,
Support