ERM.... #BlamesOnFileAnyway
You could maybe try to shrink it down to 512 X 512, lessen detail, or rename it I guess. That's all the suggestions I'd have for now. But first, since I don't seem to recognize it, what art program do you use? ;u; If any of my suggestions have worked at all, then you don't have to answer this, lol.
EDIT: I just found that last picture! First, try this: Placing the files in the "Watermill" folder instead. That might help, actually. ;u; heh..