P.S. The only explanation for why you can't complete it is that in version 1.2-1.3, the system by which the hero moved was buggy, and in those versions, heroes really did stop wherever they wanted (not only when moving to the Dwarves but also to others). Most likely, you started playing on an early version of the map and then continued playing on new versions with information from the old version...
Added 4 minutes ago
Update 19.03.2012 v.1.7
Week effects for creatures have been disabled.
Multiplayer: Господство, Извечное противостояние, Война за Магию, Торговая империя, Анатомия войны, Эксперимент
SingleScenario: Последний Рубеж, Трон, Элиралис, Вернуться домой!, Лабиринты разума
Campaign: Колонизация