Joystick intercalate with camera rotation - unity3d

Question

I make game with fps , when I rotate the camera the joystick doesn't work properly. I have a fixed Joystick , when I try to move by rotation anything in movement change . Do I need to change the joystick ? or do I need to change something in the script for the camera rotation ? When I start the game on the mobile , the rotation affects the joystick . When I move the joystick forward and do some rotation , forward becomes backward , left right , if I move right the rotation , right becomes backward , etc . what can I do
using System.Collections.Generic;
using UnityEngine;
[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 rotationY = 0F;
void Update()
{
if (Input.touchCount > 0)
{
Touch touch = Input.GetTouch(0);
float turnAngleChange = (touch.deltaPosition.x / Screen.width) * sensitivityX;
float pitchAngleChange = (touch.deltaPosition.y / Screen.height) * sensitivityY;
// Handle any pitch rotation
if (axes == RotationAxes.MouseXAndY || axes == RotationAxes.MouseY)
{
rotationY = Mathf.Clamp(rotationY + pitchAngleChange, minimumY, maximumY);
transform.localEulerAngles = new Vector3(-rotationY, transform.localEulerAngles.y, 0f);
}
// Handle any turn rotation
if (axes == RotationAxes.MouseXAndY || axes == RotationAxes.MouseX)
{
transform.Rotate(0f, turnAngleChange, 0f);
}
}
void Start()
{
//if(!networkView.isMine)
//enabled = false;
// Make the rigid body not change rotation
//if (rigidbody)
//rigidbody.freezeRotation = true;
}
}
}