I have a problem with the pop-up lose menu and win menu Please help!!

I have a problem, the lose and win menus are always shown and i want them to pop up after the player wins or loses

using UnityEngine; using System.Collections;

public class GameManager : MonoBehaviour {

 public GameObject loseMenu;
 public GameObject winMenu;

 Ball ball;

 void Awake ()
 {
     ball = GameObject.FindObjectOfType<Ball> ();
 }

 public void ShowLoseMenu ()
 {
     loseMenu.SetActive (true);
 }
 public void ShowWinMenu ()
 {
     StartCoroutine (showWinMenu());
 }

 IEnumerator showWinMenu ()
 {
     yield return new WaitForSeconds (1);

     winMenu.SetActive (true);
 }

 public void NextLevel ()
 {
     ball.gameObject.SetActive (true);
     ball.scale = 1;
     ball.fade = 1;
     ball.incresePrecent -= 0.07f;

     loseMenu.SetActive (false);
     winMenu.SetActive (false);
 }

}

these are my codes, everything is working fine but the lose and win menu