I'm working on an ecommerce site and trying to use the Featured Product plugin. It works well, except for the thumbnail image. It's not displaying the product's image, instead it's showing a generic wordpress shopping cart image. I have featured images set for all of my products, and the thumbnails show up fine on the products pages & single product pages. Did I miss a step somewhere? Is there something else I need to do to get the featured images to show up in the widget?