On network change ownership fails Enter/Exit Car

I got all networking setup working. When i enter in a car server can drive normaly but client cant move car. Client can create his own car by Netwok.Instantiate but this time server cant move this car. I tried changing owner but failed all time. Here is code in car whats wrong?

     if (other.tag == "Player" && Input.GetKeyDown("f")&&notInCar) {
         player = other.gameObject;
         NetworkViewID viewID = Network.AllocateViewID();
         networkView.RPC("EnterCar", RPCMode.AllBuffered, viewID);
     }

     [RPC]
     public void EnterCar(NetworkViewID viewID){
     NetworkView nView;
     nView = this.gameObject.GetComponent<NetworkView>();
     nView.viewID = viewID;
     }