SlideMenuController is not being shown

I am trying to use SlideMenuController library to put a left menu on Home screen but after passing a Login screen. The problem is that when I click on the button of the Login screen, a blank screen is being shown without the menu.

What I have done:

On main.storyboard I have added an UIViewController that has a button (that will be my future Login screen) and I have declared it as "Is Initial View Controller". I also have referenced this screen with UIViewControllerProve.
On UIViewControllerProve I have the following code:

```
import UIKit

class UIViewControllerProve: UIViewController {

@IBAction func btnProve(sender: AnyObject) {
createMenuView()
}

override func viewDidLoad() {
super.viewDidLoad()
}

override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}

class ContainerViewController: SlideMenuController {

override func awakeFromNib() {
if let controller = self.storyboard?.instantiateViewControllerWithIdentifier("Main") {
self.mainViewController = controller
}
if let controller = self.storyboard?.instantiateViewControllerWithIdentifier("Left") {
self.leftViewController = controller
}
super.awakeFromNib()
}

}

private func createMenuView() {
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let mainViewController = storyboard.instantiateViewControllerWithIdentifier("MainViewController") as! MainViewController
let leftViewController = storyboard.instantiateViewControllerWithIdentifier("LeftViewController") as! LeftViewController
let nvc: UINavigationController = UINavigationController(rootViewController: mainViewController)
UINavigationBar.appearance().tintColor = UIColor(hex: "689F38")
leftViewController.mainViewController = nvc
self.slideMenuController()?.automaticallyAdjustsScrollViewInsets = true
let appDelegate = UIApplication.sharedApplication().delegate
appDelegate!.window?!.backgroundColor = UIColor(red: 236.0, green: 238.0, blue: 241.0, alpha: 1.0)
appDelegate!.window?!.rootViewController = self.slideMenuController()
appDelegate!.window?!.makeKeyAndVisible()
self.slideMenuController()?.openLeft()
}
}
```

On AppDelegate.swift I have commented those functions: createMenuView and application.
I am taking as reference the example that the creator has in his GitHub.
How can I make that the menu will be shown when I click on the button of my Login screen? Am I missing something?

Thanks in advance!

Start with main.storyboard and UIViewControllerProve in the issue, then trace the login button action through createMenuView and the AppDelegate.swift root-controller setup. Check the storyboard identifiers and the controller hierarchy while running the app; done means clicking the login button displays the configured main and left menu instead of a blank screen.

Written by the indexing model from the issue text.