My if statement won't work

Hello, my if statement won't work. It won't check the if statement. The problem is occurring in the function WhichWindow. Why won't it check the if statement? It always returns false.

 using UnityEngine;
 using System.Collections;
 
 public class Login : MonoBehaviour {
 
  public Texture LoginBackground;
  public Texture2D stylebackground;
  public GUIStyle LoginStyle;
  public GUIStyle LoginTextBox;
  public GUIStyle LoginButton;
  public string Username;
  public string Password;
  public float transparent;
  private string url;
  public WWW w;
  public WWWForm loginform;
  public bool doWindow0 = false;
  public string formText;
  // Use this for initialization
  void Start () {
  LoginStyle.fontSize = 72;
  LoginStyle.alignment = TextAnchor.MiddleCenter;
  LoginTextBox.fontSize = 20;
  LoginTextBox.alignment = TextAnchor.MiddleCenter;
  LoginTextBox.normal.background = stylebackground;
  LoginButton.fontSize = 30;
  LoginButton.alignment = TextAnchor.MiddleCenter;
  loginform = new WWWForm();
  }
  
  // Update is called once per frame
  void Update () {
  
  }
  
  void OnGUI() {
  GUI.backgroundColor = Color.black;
  GUI.DrawTexture(new Rect(0,0,Screen.width,Screen.height),LoginBackground,ScaleMode.StretchToFill, false, 0.0f);
  GUI.Label(new Rect(Screen.width/2-250,Screen.height/2-250,500,250),"Username:", LoginStyle);
  Username = GUI.TextField(new Rect(Screen.width/2-250,Screen.height/2-80,500,50), Username, 10, LoginTextBox);
  GUI.Label(new Rect(Screen.width/2-250,Screen.height/2-50,500,250),"Password:", LoginStyle);
  Password = GUI.TextField(new Rect(Screen.width/2-250,Screen.height/2+120,500,50), Password, 10, LoginTextBox);
  if (GUI.Button(new Rect(Screen.width/2-150,Screen.height/2+200,300,50),"Login:", LoginButton))
  {
  //CheckLogin();
  StartCoroutine(CheckLogin());
  print(WhichWindow(formText));
  }
  if (doWindow0 == true)
  {
  GUI.Window (0, new Rect (Screen.width/2-700,Screen.height/2-100,400,120), DoMyWindow, "Notice:");
  }
 
  }
  
  void DoMyWindow (int windowID) {
  GUI.Label(new Rect (10, 20, 800, 40), formText);
  if (GUI.Button (new Rect (10,80,100,20), "Close"))
  {
  Application.LoadLevel("CharacterSelect");
  doWindow0 = false;
  }
  }
  
  IEnumerator CheckLogin()
  {
  url = "http://redlightlife.tk/scripts/checklogin.php?username=" + WWW.EscapeURL(Username) + "&password=" + WWW.EscapeURL(Password);
  w = new WWW(url);
  yield return w;
  if (w.error != null)
  {
  print(w.error);
  }
  if (w.error == null)
  {
  formText = w.text;
  w.Dispose();
  print(formText);
  StopAllCoroutines();
  }
  }
  bool WhichWindow (string text)
  {
  print("WhichWindow function started");
  print(text);
  if (text == "Login success. Click the close button to continue to the character selection screen.")
  {
  return true;
  }
  else 
  {
  return false;
  }
  }
 }