title: presentModalViewController doesn't work
body: <pre><code>-(void)backAction:(id)sender
  { 
     SecondViewController *viewCtrl = [[SecondViewController alloc] init];
  
     [self.presentingViewController dismissModalViewControllerAnimated:NO];
  
     [self.presentingViewController presentModalViewController:viewCtrl animated:YES];
  }
  </code></pre>
  
  <p>I want to <code>dismissModalViewControllerAnimated</code> the current controller,then present a new controller. But it only <code>dismissModalViewControllerAnimated:NO</code>.</p>
  
  <p>why?</p>