leave the server running for roughly 30 mins and then check the new cave, if its at the bottom of the mongen and is a fairly big mongen some of the mobs take a while to spawn. also im sure caps make a difference (maybe some 1 will clear that with me) E.G if the map is lets say GoodMap and uv put goodmap on mongen im sure that makes a difference but its been a while since i messed with server files