Thanks so mush Traveler ..

ohh ... I am sorry , ..
I use GLScene , and the collision manger component with it .
in fact i see that Collision manager is not working correctly when you rescaling objects , and it make many problems to me ,
some like : it generate a collision detection from a wide distance from the wall ... ??

and other thing that it must be another code for prevent the actor moving forward (or left or right) when it touch the wall , i mean what is the function to know when stop and when walk ..

if you have an answer pleas write me ....
thanks agin .