Help! Some images not showing

[smalltownpets]

I'm VERY new to this web site building (I actually have someone who built it for me). I've become "in the know" enough to add some products and pictures to my store. But before I got to feeling too good about myself, I ran into a big problem . Some of my images won't show up on the online view. They load and showup just fine when I preview the product, but the store view has the little red x. The images are 49 and 52 KB. Not big, & I keep having them resized.
Jen

[Kim]

The address to one of these problem pages?

[smalltownpets]

www.smalltownpets.net/townstore/

I'm having trouble in Holiday Doggie Duds