Hw to add rigid physic to a Geom Enity?

Hi! I imported an object (like a house) to CryEngine in Geom Entity session.

But in scene object has no rigid physics. The player pass by the object as if nothing is in place.

So, how can I add the rigid effect to object?

[Blocked Image: http://img59.imageshack.us/img59/3310/img2dd.jpg]

It's a really different process than could thought. With this link I think I can adjust it.

Works now! x) I forget to create the collider called "proxy" to make that rigid object. Without it doesn't works.

Just search for it: CryEngine 3 Tutorial - 3ds Max Custom Models and Textures

Thanks!