Sprites not showing up in game

[RambOrc]

One of the attached sprites (sho1) is working fine, but if I add the other sprite (aco1) to sprites.pk3, the game doesn't display anything. It's definitely the image file itself, tested it by using the same file name for either image in sprites.pk3. Any ideas?

[RambOrc]

Problem solved: http://forum.zdoom.org/viewtopic.php?f=3&t=36980