CLLocation Manager Delegate changes in iPhone OS 4.0.

Question

  Hi,

     In iPhone OS 4.0  the CLLOcationManager Delegate is not getting called .

   Code:



     -(BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:
      (NSDictionary *)launchOptions 
      {

[self newLocationUpdate];
      } 





   -(void)newLocationUpdate 
      {

locationManager = [[CLLocationManager alloc] init];
locationManager.delegate = self;
[locationManager startUpdatingLocation];

     }




    - (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:
     (CLLocation  *)newLocation  fromLocation:(CLLocation *)oldLocation 
    {


   [locationManager stopUpdatingLocation];
    }



  what changes should we make so that delegate method should be  called?