I have just stared a campaign with the Romans, and as I am trying to attack the Epeirote city on Italy and have my men take the walls, I of course want to take over the towers too, but I am not able to.

If I order my men to run to the other side of the tower, they halt their movement. If I move my men onto the ground, they enter the tower but it is still not taken over. This is a very obnoxious problem.