Did you grab an existing Troll and place them in your mod, or did you create one from scratch and use that? If the latter, then you may not have put the scripts or AI packages on the critter to make them attack. Easiest is to grab a copy of the existing Troll and place that in the world. If you make any changes to the Troll, give it a new FormID so it wont' replace every troll in the game.
As for the Ore Vein, there is the Ore Vein and then there is the Activator that actually allows you to interact with it. I think the Activator is just like the base Ore Vein in look and feel but it also allows you to activate it like anything else in the game you can activate.
See this thread for objects that are activated, it tells you what to look for.
http://www.gamesas.com/topic/1501375-how-to-add-forges-to-player-homesdungeons/
And, your English is fine, as long as you can post your problem so that we understand it, we can help you.