problem with pause menu c#

hi i have problem my i cant open my pause menu with Pause input . but i dont know why.

public GameObject Pausemenu;

private bool paused = false;

void Start()
{
    Pausemenu.SetActive(false);

} 
void Update()
{

    if (Input.GetButtonDown("Pause"))
    {

        paused = !paused;

    }
    if (paused)
    {
        Pausemenu.SetActive(true);
        Time.timeScale = 0;
    }
    if (!paused)
    {
        Pausemenu.SetActive(false);
        Time.timeScale = 1;
    }

}

}

i have. but thanks for tip