I have an amulet in the mod I'm working on. It has a proper icon image file set in the dialogue box. It also has an enchantment. In the game however, there are no error messages but the icon doesn't show up, just the blue swirly enchantment background. There is not even the "missing icon" image. The icon displays properly in the CS. All other icons for my project work and they are the same picture format. What is going on?

The image might be too big. Double check that it's the same dimensions as your others.
(images that are too big often appear as just a small dot)

It is of the same dimensions and format. That's not the problem.

Odd. I just opened up the image in photoshop and there is nothing there. But, it does have a thumbnail when viewed in explorer. I'm going to try to restore the image.

Edit: problem fixed!