Cancel Button

hey everyone having trouble with this cancel button

Code:

- (void)viewDidLoad {
	nameField.delegate = self;
	descriptionField.delegate = self;
	
	self.navigationItem.title = @"New";
	self.navigationItem.leftBarButtonItem = [[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCancel 
																						   target:self action:@selector(cancel:)] autorelease];
	
    UIBarButtonItem *cancelButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"Cancel" style:UIBarButtonItemStyleBordered target:self action:@selector(cancel)];
    self.navigationItem.leftBarButtonItem = cancelButtonItem;
    [cancelButtonItem release];
	
    [super viewDidLoad];
}

my header is

Code:

@interface AddViewController : UIViewController <UITextFieldDelegate>


{
	
	UITextField *nameField;
	UITextField *descriptionField;
	TableViewController *delegate;
}
@property (nonatomic, assign) TableViewController *delegate;
@property (nonatomic, assign) IBOutlet UITextField *nameField;
@property (nonatomic, assign) IBOutlet UITextField *descriptionField;




- (void)save;
- (void)cancel;

shouldnt that be enough to make it work? A cancel button or a nav bar does not show up.