Problem displaying modal view controller.

Question

I have created a view controller with view in IB, and am trying to display it as a modal view. But when I press the button all I get is a blank screen. If I look at the view object within the new view controller, I can see it has loaded the subviews, but nothing is shown. I created a test project, so I could figure out what I am doing wrong, but here is the code I have to display:
ModalView *newView = [[ModalView alloc] initWithNibName:@"ModalView" bundle:nil];
SubViewNewAppDelegate *delegate = [[UIApplication sharedApplication] delegate];
[[delegate viewController] presentModalViewController:newView animated:YES];
ModalView is a generic UIViewController created by Xcode.
And the xib looks like:
File's Owner (Class set to ModalView, Outlet view to View)
First Responder (Blank)
ViewController (Class set to ModalView, Outlet view to View)
-View
--Label

Answer 1

Hi Maksim
          Info sent to me was very useful.
I have performed the steps which u have sent in the link,but I didn't get the desired result.
when I hit the "Exit" button for the first time nothing happens but when agained clicked,It gave me a error saying that "Your Application is Expired :errCode,500"
Pl tell me wht could be the problem
Thanks a lot
sethu