Why collidion doesn't work on a cube attached to first person controller

Hello, I have placed first person controller and attached a cube to it. Than I have created another cube on the ground without rigidbody but with box collider and the cubes doesn’t collide with any other object. How can I repair that? Thank you

http://s28.postimg.org/vv6t0brnh/wtf.jpg

So u want to detect collision between Character Controller attached to A first person controller prefab and a Box Collider attached to a box, if that is the case u should examine collision on any script attache dto the player in the callback Message:

function OnControllerColliderHit (hit : ControllerColliderHit)
{
    // hit is the thing that we are colliding with
}