Here's my code:

```
UIBarButtonItem *leftButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(rightButtonPressed)];
[self.navigationItem setLeftBarButtonItem:leftButton];
[leftButton release];

```

The 'self' class is inherited form an UINavigationController and is I presenting it from an other UIViewController with the 'presentModalViewController' method.
What do you think? Why isn't displaying the left button?