how to stop npc's walking through walls or stop bouncing off of rigidbodies,how to stop npc's walking through walls or stop bouncing off of rigidbodies

hi , i am new to game development.
ich i have tried rigidbody and character controller .
both ar running through the wall , i have tried it with additional colliders, the wall also has a collider… they still walk through.
the only thing i can do is to make a rigidbody and remove the kinetic . but then when its dead my character bounces a lot and i cant get rid of it with physic settings so far.

pls help.!
link text

,

i kinda solved it, due to the fact that it only bounce if when the npc is dead (dont know why) i just enabled kinetic on death … no more bouncing off … lol, i know its a cheap solotion ^^