BECKLES'S PROFILE

Whenever I test play any battles in my RPG, the enemies are impossible to kill. I've checked google and had a good look on this forum, but to no avail.

Basically, what happens is this: After the monster's HP runs out, I hear the sound effect that's supposed to play when an enemy dies, but the creature remains on the screen. No matter how many times I kill one, whether it be in a battle test or in actual game play, they will not die and the battle will not end until the hero dies. It doesn't matter what I'm fighting.

Any idea what could be wrong?