presentModalViewController - UIToolbar below something invisible

I'm calling a UIViewController and presenting it like this in a navigation-based project:

[self presentModalViewController:self.controller animated:YES];

On the top of the controller I have a UIToolBar with 2 buttons which I created in the IB. Everything appears, but there is something invisible on the top of my UIToolBar. I concluded that because if I click on one of the buttons, nothing happens. If I click on the very top (the bar where the time is), then the button is activated. The area where I click and nothing happens is the same as the navigation bar. If that's the case, how can I put my view over the nav开发者_如何学运维igation bar, so that the buttons on my toolbar are accessible?

Now I have it working properly! I have to call presentModalViewController with a UINavigationController and not my own controller, which is a subclass of UIViewController. Here it is some code, in case it helps someone:

UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:self.contr];
[self presentModalViewController:navController animated:YES];
[navController release];

And in the viewDidLoad, inside the controller:

UIBarButtonItem *cancelButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCancel target:self action:@selector(goBack:)];
self.navigationItem.leftBarButtonItem = cancelButton;

Simple:

yourView.userInteractionEnabled = NO;