The World of Avlis

Ugh, I don't know where to post this, but I made a start of a module. I added a Gnoll to it, which moves along waypoints, but it won't keep playing the 'Walk' animation. It moves once along all the frames, after that it continues moving, but like a statue. When it sees me, it attacks with normal animation, but when I disappear, it breathes for a while and becomes a statue again. Any ideas ? I watched the gnolls on Mythos, and they work just fine... When I make a Gnoll char with the character creator, I get the same bug =(