My MoviePlayer doesn't respond to function - iphone

Question

I am facing problem of memory leak and other MoviePlayer new initiation as my MoviePlayer doesn't respond to function, in which I am releasing that player on my done button.
(void) playMovieAtURL
{
MPMoviePlayerViewController *mpViewController = [[MPMoviePlayerViewController alloc] initWithContentURL:[NSURL URLWithString:videoURL]];
mpViewController.view.backgroundColor = [UIColor blackColor];
[self presentMoviePlayerViewControllerAnimated:mpViewController];
[mpViewController.view setCenter:self.view.center];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(myMovieFinishedCallback:)
name:MPMoviePlayerPlaybackDidFinishNotification
object:mpViewController];
}
// When the movie is done,release the controller. (Doesn't come in it.)
-(void)myMovieFinishedCallback:(NSNotification*)aNotification
{
MPMoviePlayerController* theMovie=[aNotification object];
[[NSNotificationCenter defaultCenter] removeObserver:self
name:MPMoviePlayerPlaybackDidFinishNotification
object:theMovie];
// Release the movie instance created in playMovieAtURL
[theMovie release];
}

Answer 1

Not sure it's your case, but this is what documentation says about MPMoviePlayerPlaybackDidFinishNotification:
This notification is not sent in cases
where the movie player is displaying
in fullscreen mode and the user taps
the Done button. In that instance, the
Done button causes movie playback to
pause while the player transitions out
of fullscreen mode. If you want to
detect this scenario in your code, you
should monitor other notifications
such as
MPMoviePlayerDidExitFullscreenNotification.
It seems that MPMoviePlayerPlaybackDidFinishNotification is called just when the movie stops by itself.
If you are using the Done button, you should use MPMoviePlayerDidExitFullscreenNotification instead.

Answer 2

I tried to solve it by passing nil and now it is returning me callbacks but still the movie won't releases, I will try ur suggestion also. Anyways my new code
-(void) playMovieAtURL
{
MPMoviePlayerViewController *mpViewController = [[MPMoviePlayerViewController alloc] initWithContentURL:[NSURL URLWithString:videoURL]];
mpViewController.view.backgroundColor = [UIColor blackColor];
[self presentMoviePlayerViewControllerAnimated:mpViewController];
[mpViewController.view setCenter:self.view.center];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(myMovieFinishedCallback:)
name:MPMoviePlayerPlaybackDidFinishNotification
object:nil];
}
// When the movie is done,release the controller.
-(void)myMovieFinishedCallback:(NSNotification*)aNotification
{
MPMoviePlayerController* theMovie=[aNotification object];
[[NSNotificationCenter defaultCenter] removeObserver:self
name:MPMoviePlayerPlaybackDidFinishNotification
object:nil];
// Release the movie instance created in playMovieAtURL
[theMovie release];
}