Spellforce Order Of Dawn Iso SPELLFORCE - THE ORDER OF DAWN - TUTORIAL HELP?

SPELLFORCE - THE ORDER OF DAWN - TUTORIAL HELP? - spellforce order of dawn iso

the part where you to build things in the manual and he says to two towers, built near the stone on. I've built six in several nearby blocks and doors and everything he says and continues the construction of two more near the slab. Where the hell do I build?
which makes me mad. Help pleeessseeeee =) xx