Player pass through a cube only on its right side

I don’t understand why, but I got this weird problem, hours and hours trying to fix it but I can’t by myself.

Player pass through the rock (That really is a cube) but only from its right side.

Both objects (Player and Rock) have Collision Detection: Continuous and Freeze Rotation X, Y, Z.

but the problem Still happens though, very weird.

this is the video wich I will show you what really happens: link text

I hope you can help me, by the way my broken english is becuase english is not my first lenguage I am from Spain :stuck_out_tongue:

Gretings!,

If its a 2D game maybe you should consider using BoxCollider2D instead of the 3D Box Collider, also should use Rigidbody2D instead as well.