i cant look up and down,any help?

P.S:i have already m made a game using the same code and it does work to move the camera up and down,the only difference is that in that game i used a cube and in this game i am using a cylinder as "Player"

using System.Collections; using System.Collections.Generic; using UnityEngine;

public class PlayerLook : MonoBehaviour { public Transform playerBody; public float mouseSensitivity;

 float xAxisClamp = 0.0f;

 void Awake()
 {
     Cursor.lockState = CursorLockMode.Locked;
 }

 void Update()
 {
     RotateCamera();       
 }

 void RotateCamera()
 {
     float mouseX = Input.GetAxis("Mouse X");
     float mouseY = Input.GetAxis("Mouse Y");

     float rotAmountX = mouseX * mouseSensitivity;
     float rotAmountY = mouseY * mouseSensitivity;

     xAxisClamp -= rotAmountY;

     Vector3 targetRotCam = transform.rotation.eulerAngles;
     Vector3 targetRotBody = playerBody.rotation.eulerAngles;

     targetRotCam.x -= rotAmountY;
     targetRotCam.z = 0;
     targetRotBody.y += rotAmountX;

     if(xAxisClamp > 90)
     {
         xAxisClamp = 90;
         targetRotCam.x = 90;
     }
     else if(xAxisClamp < -90)
     {
         xAxisClamp = -90;
         targetRotCam.x = 270;
     }

     print(mouseY);


     transform.rotation = Quaternion.Euler(targetRotCam);
     playerBody.rotation = Quaternion.Euler(targetRotBody);


 }

}