Animator says that animation is playing when it's not.

Well, I was programming an enemy that would start running at you and attacking. I used an exported model from 3dsMax, with the animations and so on. When the script executes, the animator changes between idle and Run states. The main problem is that, after that, the animation (which is only one step) stops playing. So, the thing is that, uppon changing the animation, it only reproduces once, though the animator says that it's still being reproduced, and the blue bar under the state still runs. Any ideas on how to solve this?