I'm Following Instructions, But

I really am following instructions.
At least I THINK I'm following instructions.
Photos are going up on my new website prior to launching.
At least, they are SUPPOSED to be going up. I think I am doing the right things, then pressing "Publish," and the (insert expletive) photos are not publishing. Guess I am not doing the right things.

This, for example, will not publish on the website but happily goes up here on blogger:

(The vase is 7.5" tall, and 4.5" wide at its widest part, by the way. It has a price tag of $48.)

Boy, the learning curve is steep at the beginning of a new process.
Let me say that again. BOY, THE LEARNING CURVE IS STEEP AT THE BEGINNING OF A NEW PROCESS.

Pardon my "Aaaaaaargh!"