Why are My Alien Zombies Swimming?

I craeated an Alien Zombie in Max 8 but when he animates in Unity he does it face down kind of like he's swimming even though he starts of in his "T" stand position, anyone know why this would be happening? I've been trying to solve that issue for weeks now.

NOTE: all his test animations worked out fine it just when I add his AI script he does this, it's very frustrating not knowing the answer to this problem.

UPDATE: I finally got this problem solved" http://answers.unity3d.com/questions/46748/im-still-searching-for-an-answer-to-this-charcater-animation-problem

This is kinda obvious, but did you try to freeze rotation on the rigidbody? (assuming thats how youre handling it)