I installed IH2 and I'm almost there

... It's weird, it works on all images except the product info image. I can only "click to enlarge" the main product image... opens up a new window, the old school way. Even products that I have multiple pictures, IH2 works on the additional pictures, it just won't enlarge the main product photo when you hover over it?
I didn't upload my product photos in either the "Large" or "Medium" folders when I was creating my products. I just used the "Main Directory" I upload all photos at 400x400 pixels and was letting ZenCart handle the re-sizing for thumbnails. This always worked out for me. Anybody have any ideas on what I can do to make the main image enlarge when you hover over it? If I can get that accomplished, I'm good to go. Thanks all.
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