My pause menu won't show when i click Escape

Well I think my code is good But when i try to make Pause in my Game it just don't work. My Pause Menu disappear as it should but it won't come back when i Press Escape. here is code:

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

public class Pause : MonoBehaviour { public static bool isGamePaused = false;

 public GameObject pauseMenu;
 
 
 void Update()
 {
     if (Input.GetKeyDown(KeyCode.Escape))
     {
         if (isGamePaused)
         {
             ResumeGame();
         }
         else
         {
             PauseGame();
         }
     }
 }

 public void ResumeGame()
 {
     pauseMenu.SetActive(false);
     Time.timeScale = 1f;
     isGamePaused = false;
 }

 void PauseGame()
 {
     pauseMenu.SetActive(true);
     Time.timeScale = 0f;
     isGamePaused = true;
 }

}