Vehicle Script not turning left and right!

My vehicle enter/exit script is not turning left and right, i am using the realistic fps prefab. If you can help me, i'll be very happy, you'll also get your name in the credits on steam release. :)

Here is the current car script var topSpeed = 120; var weight : int = 10; var tireTraction : int = 3; var slowDown = false;

 function Update()
 {
 
 //controller = GetComponent(CharacterController);
 var controller : CharacterController = GetComponent(CharacterController);
 var moveDirection = transform.TransformDirection(Vector3.forward);
 var curSpeed = vehicleSpeed * Input.GetAxis("Joystick Move X");
 
 transform.Rotate(0, Input.GetAxis("Joystick Move Y") * tireTraction, 0);
 if (Input.GetKey("w") || Input.GetKey("up"))
 {
     slowDown = false;
     if (vehicleSpeed < topSpeed)
         {
             vehicleSpeed += 1 * Time.deltaTime * conversionMetrics;
     }
 }
 if (Input.GetKeyUp("w") || Input.GetKeyUp("up") || Input.GetKeyUp("s") || Input.GetKeyUp("down") || Input.GetKeyUp("space"))
 {
         slowDown = true;
 }
 if (slowDown == true)
 {
     if (vehicleSpeed > 0)
         {
             vehicleSpeed -= 1 * Time.deltaTime * conversionMetrics;
         if (vehicleSpeed == 3)
             {
             slowDown = false;
             vehicleSpeed = 0;
         }
         }
 }        
     if (Input.GetKey("s") || Input.GetKey("down"))
     {
         slowDown = false;
         if (vehicleSpeed > 0)
         {
             vehicleSpeed -= 5 * Time.deltaTime * conversionMetrics;
             if (vehicleSpeed == 3)
             {
                 slowDown = false;
                 vehicleSpeed = 0;
             }
         }
     }    
     if (Input.GetKey("space"))
     {
         slowDown = false;
 
         if (vehicleSpeed > 0)
     {
             vehicleSpeed -= 12 * Time.deltaTime * conversionMetrics;
             if (vehicleSpeed == 3)
             {
                 slowDown = false;
                 vehicleSpeed = 0;
             }
         }
     }
 
     // Apply weight
     moveDirection.y -= weight * Time.deltaTime;
     
     // Move the controller
    controller.SimpleMove(moveDirection * vehicleSpeed);
     
     if (vehicleSpeed < 0)
     {
         vehicleSpeed = 0;
         slowDown = false;
     }
     }