Resizing Photos in WP e-commerce

I’m trying to resize the images that are in the detailed view of my items. The thumbnails are perfectly fine but when you click on them, I’d like a much larger view of the photos.

The actual photos themselves are about 800×1100 so thats definitely not the problem. I have also changed the “Single Product Image Size” in the settings but that makes no difference.

Any ideas??

Thanks…