I was tossing an animation together. I added the custom graphics to the database, previewed them, and then selected them for use in the animation tab. However, despite the fact that they are the correct size (192p tall by 960 wide for 5 frames each) they do not show in the selection window under the animation workscreen; there is nothing there at all. I had them working at one point prior, but removed them to improve the graphics- now nothing. What could the problem be?