I'm trying to implement a basic `UINavigationController` and I'm running into an issue with the navigation controller displaying a wrong view.

I started by creating a `Window Based Application` in `Xcode 4` that gave me the following files:`spellingAppDelegate.h`, `spellingAppDelegate.m` and `MainWindows.xib`. I then added a new `UIViewController` subclass and call it `gameViewController`.

The following is my code for `myAppDelegate.h`

```
#import <UIKit/UIKit.h>

@interface spellingAppDelegate : NSObject <UIApplicationDelegate> {
    UIWindow *window;
    UINavigationController *navigationController;
}

@property (nonatomic, retain) IBOutlet UIWindow *window;
@property (nonatomic, retain) UINavigationController *navigationController;

@end

```

the following is my myAppDelegate.m 

```
#import "spellingAppDelegate.h"
#import "gameViewController.h"
#import "resultViewController.h"

@implementation spellingAppDelegate

@synthesize window = window;
@synthesize navigationController = navigationController;

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    [self.window makeKeyAndVisible];

    // create the MyView controller instance:
    gameViewController *controller = [[gameViewController alloc] initWithNibName:@"gameViewController" bundle:nil];

    // set the title that appears in the navigation bar:
    [controller.navigationItem setTitle:@"Main View"];

    // create the Navigation Controller instance:
    UINavigationController *newnav = [[UINavigationController alloc] initWithRootViewController:controller];

    // set the navController property:
    [self setNavigationController:newnav];

    // release both controllers:
    [newnav release];
    [controller release];

    // add the Navigation Controller's view to the window:
    [window addSubview:[navigationController view]];

    return YES;
}

```

I was under the impression that if i run the above code, the app will start with gameViewController.xib. However, its displaying MainWindow.xib. I know I'm probably miss something basic but I can't figure out what I did wrong. Thank you.