Camera Control

Hi, I want to make first person camera in PhysX Vehicle 3.3.
So I modify the target

target.y+=0.3f;
target.x+=0.9f;
target.z+=0.6f;

and position in samples: position = target-direction*camDist
I modify into: position=target-direction

that makes the first person camera
but the camera can’t fix to the position I want.
sorry for my bad english