Cant see small, large, original photos in gallories nor slideshow since making custom

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Cant see the original or large photo's in my Galleries since making custom header/banner. Also, slideshow works sometimes but not all the time.
My site www.bradthompsonphotography (http://www.bradthompsonphotography)

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Note: When you go into gallery settings under appearance and make smugmug the appearance instead of custom, all works fine.