AI Kills me when i walk into a building.. Need Fast Response

So I made a house and when i walk in it the ai/zombie justs kills me doesnt come in to kill me just stays outside and kills me, is there anyway to fix him staying outside and not coming in the house? Also i downloaded an pistol aimset because my character doesnt have any aimsets and i cant import it how do i import that because i open folder and it doesnt have anything in it

Um… context, please?

We will really need more information. Blueprint of your AI with the part where he traces you and attacks you. Normally you let the AI track if he can directly see you. Otherwise he should try to chase you over the NavMesh.

I have no idea what importing fails, but normally you either rightclick in the folder you want to import things (inside UE4 Editor) and just select import.