Smart load is a rocket theme feature, I believe, not virtuemart. So you'll likely need to get assistance with that template maker or pay some one. Sorry I can't be more help. I do know a good virtue mart customizer if you want details, pm me. He has reasonable rates and very knowledgeable.
One of the vm admins may still offer better help than me. The problem is really in the two templates working together, not vm, unless your Joomla base is gantry, if so, look in template settings, that's where it will be IF the feature is available. It may be called something else. I don't know how sophisticated your template is. Make sure you have downloaded the latest version of vamazing, it fixed some things.