Mobs issue

I have an issue with my WoW server. It doesn't matter if I compile my own Skyfire server or use a Repack (which I usually can't get working anyway because worldserver.exe can't ever connect to the world database). Whenever I get a WoW server up and running, none of the mobs move. They all just...stand there. Unless of course you attack them. Is this normal for all 4.0.6+ servers? Is this the case for servers before Cataclysm?

Thanks!