error: expected specifier-qualifier-list before 'GKPeerPickerController - objective-c

Question

I keep getting this message (in the title). Just take a quick look at my code if you want to see what I'm doing. I've just started implementing the Peer Picker, so I'm not completely done yet. I just need some advice/help in the first part. The error shows up in the .m file between the two #import statements, which means it has to be some wrong way that I've used the GKPeerPickerController in the header file.
Bluetooth_Ad_Hoc_NetworkAppDelegate.h
#import <UIKit/UIKit.h>
#class Bluetooth_Ad_Hoc_NetworkViewController;
#interface Bluetooth_Ad_Hoc_NetworkAppDelegate : NSObject <UIApplicationDelegate> {
UIWindow *window;
Bluetooth_Ad_Hoc_NetworkViewController *viewController;
GKPeerPickerController *picker;
GKSession *session;
IBOutlet UILabel *status;
NSData *data;
}
#property(nonatomic, retain)IBOutlet UILabel *status;
#property(nonatomic, retain)GKPeerPickerController *picker;
#property(nonatomic, retain)GKSession *session;
#property(nonatomic, retain)IBOutlet UIWindow *window;
#property(nonatomic, retain)IBOutlet Bluetooth_Ad_Hoc_NetworkViewController *viewController;
#end
Bluetooth_Ad_Hoc_NetworkAppDelegate.m
#import "Bluetooth_Ad_Hoc_NetworkAppDelegate.h"
#import "Bluetooth_Ad_Hoc_NetworkViewController.h"
#implementation Bluetooth_Ad_Hoc_NetworkAppDelegate
#synthesize status;
#synthesize picker;
#synthesize session;
#synthesize window;
#synthesize viewController;
- (void)applicationDidFinishLaunching:(UIApplication *)application {
// Override point for customization after app launch
[window addSubview:viewController.view];
[window makeKeyAndVisible];
// allocate and initialize data
data = [[NSData alloc] initWithBytes:&status length:sizeof(status)];
// Allocate and setup peer picker controller
picker = [[GKPeerPickerController alloc] init];
picker.delegate = self;
picker.connectionTypesMask = GKPeerPickerConnectionTypeNearby;
[picker show];
}
- (void)dealloc {
[status release];
[viewController release];
[window release];
[super dealloc];
}
#end

Answer 1

Have you included this statement in the header file?
#import <GameKit/GameKit.h>
Also you need to include the GameKit framework.