HOw to change the title of the adressbook navigation bar ?

Question

HI ,,

I am using addressbook API when i call via modal view controller and the addressbook navigation bar comes from bottom and it shows the title "ALL CONTACTS" iwant to show here my app name also show the prompt on the navigation bar . How can i do it ?

i tried it as :-

ABPeoplePickerNavigationController *abpicker=[ABPeoplePickerNavigationController alloc]init];

[abpicker setPeoplePickerDelegate:self];

[self presentModalViewController: abpicker animated:YES];
//abpicker.navigationBar.topItem =@"";
peoplepicker.navigationItem.prompt=@"helo";

but it does not work as i want .

how can we do it pls help me !! Thanks !!!