actions buttons not being displayed when adding contact

Question

I have TabBar iPhone application that has a UINavigationController that contains a ViewController that has a ABUnknownPersonViewController.view as a subview.

When I click on "Create New Contact" or "Add to existing contact", I can see the button items in the animation coming up the screen, but they seem to get hidden beneath the navigation bar.

Is there any easy way to solve this ?

Thanks