Movement with Camera

Hi everyone, I have a problem with my movement or camera or maybe both. I made two seperate script which are PlayerMovement which has the players movement in C# and a MouseLook which enables you to look around in 360 degrees also in C#. Now everything works expect when I move forward and lets say I turn my camera to the right the player starts to strafe right and if I turn the camera to the right again he is now moving backwards. By the way this is a Third Person Game. Any Ideas on how I can fix this?

 using UnityEngine;
 using System.Collections;
 
 public class PlayerMovement : MonoBehaviour {
 
     public float speed = 5.0f;
     public float jumpSpeed = 5.0f;
     public float gravity = 20.0f;
     public float run = 2.0f;
     public float crouchSpeed = 0.5f;
     private Vector3 moveDirection = Vector3.zero;
 
     void Start()
     {
                 transform.position = new Vector3(0,1.7f,0);
         }
 
     void Update()
     {
                 CharacterController controller = GetComponent<CharacterController> ();
                 if (controller.isGrounded) {
                         moveDirection = new Vector3(Input.GetAxis ("Horizontal"), 0, Input.GetAxis ("Vertical"));
                         moveDirection = transform.TransformDirection (moveDirection);
                         moveDirection *= speed;
                         if (Input.GetButton ("Jump"))
                                 moveDirection.y = jumpSpeed;
                             if (Input.GetKey(KeyCode.LeftShift))
                                 moveDirection *= run;
                                 if (Input.GetButton("Crouch"))
 
                                     //transform.position.y -= 1.5;
                                     //transform.localScale.y -= new Vector3(0,.5f,0);
                                     moveDirection *= crouchSpeed ;
                                     
                 }
 
                 moveDirection.y -= gravity * Time.deltaTime;
                 controller.Move (moveDirection * Time.deltaTime);
         }
 }

 using UnityEngine;
 using System.Collections;
 
 [AddComponentMenu("Camera-Control/Mouse Look")]
 public class MouseLook : MonoBehaviour {
 
     public enum RotationAxes { MouseXAndY = 0, MouseX = 1, MouseY = 2 }
     public RotationAxes axes = RotationAxes.MouseXAndY;
     public float sensitivityX = 15F;
     public float sensitivityY = 15F;
 
     public float minimumX = -360F;
     public float maximumX = 360F;
 
     public float minimumY = -60F;
     public float maximumY = 60F;
 
     float rotationX = 0F;
     float rotationY = 0F;
     
     Quaternion originalRotation;
 
     void Update ()
     {
         if (axes == RotationAxes.MouseXAndY)
         {
             // Read the mouse input axis
             rotationX += Input.GetAxis("Mouse X") * sensitivityX;
             rotationY += Input.GetAxis("Mouse Y") * sensitivityY;
 
             rotationX = ClampAngle (rotationX, minimumX, maximumX);
             rotationY = ClampAngle (rotationY, minimumY, maximumY);
             
             Quaternion xQuaternion = Quaternion.AngleAxis (rotationX, Vector3.up);
             Quaternion yQuaternion = Quaternion.AngleAxis (rotationY, Vector3.left);
             
             transform.localRotation = originalRotation * xQuaternion * yQuaternion;
         }
         else if (axes == RotationAxes.MouseX)
         {
             rotationX += Input.GetAxis("Mouse X") * sensitivityX;
             rotationX = ClampAngle (rotationX, minimumX, maximumX);
 
             Quaternion xQuaternion = Quaternion.AngleAxis (rotationX, Vector3.up);
             transform.localRotation = originalRotation * xQuaternion;
         }
         else
         {
             rotationY += Input.GetAxis("Mouse Y") * sensitivityY;
             rotationY = ClampAngle (rotationY, minimumY, maximumY);
 
             Quaternion yQuaternion = Quaternion.AngleAxis (rotationY, Vector3.left);
             transform.localRotation = originalRotation * yQuaternion;
         }
     }
     
     void Start ()
     {
         // Make the rigid body not change rotation
         if (rigidbody)
             rigidbody.freezeRotation = true;
         originalRotation = transform.localRotation;
     }
     
     public static float ClampAngle (float angle, float min, float max)
     {
         if (angle < -360F)
             angle += 360F;
         if (angle > 360F)
             angle -= 360F;
         return Mathf.Clamp (angle, min, max);
     }
 }