Changing Player Collision

Hi there!

Ive been learning to use Torque 3D at Uni and have recently bought my own copy and begun creating models for it.

However the new player model im working on at the moment doesnt collide with the ground properly and instead the mesh is merged halfway into it.

Like this:

http://i1109.photobucket.com/albums/h437/jackburfy1/BadCollision.jpg

So I was wondering, how do you change where the player collision box is exported in 3ds max?

Thanks for your help =D