[Help] Collision and Pathfinding error

Hi there ! I'm having a little problem here, i got a prototype where i create a few torrets that fly, and then hunt for the enemy. The problem is that in some cases the torret ignore the walls (Obstacle of pathfinding) and just stay stuck or overlap the wall... How can i make it not happen ? (Every time i run the demo this happens at least once).

I leave the .capx and a video

skydrive.live.com/redir

How do you get the turrets to chase you? When I run the .capx they just all spin in place.

I was going to see if maybe something was making them fail their pathfinding query.

How do you get the turrets to chase you? When I run the .capx they just all spin in place.

I was going to see if maybe something was making them fail their pathfinding query.

My bad, here are the controls:

N: delete all enemy and turret (you have to this when you start)

J: shoot

K: new torret

L: new enemy

Anyone ? Any help here ?

UP! Can anyone help me here please ?