How can I use MPMoviePlayerController within my application?

Question

I'm having trouble implementing MPMoviePlayerController. I've downloaded and run the MoviePlayer app, and it works fine, but I'm unable to reproduce this functionality in my own app. I have added the MediaPlayer Framework and imported to my app.

Here are the relevant parts of my code:

UITableViewController class:

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    if (indexPath.section==1) {
        MyAppDelegate *appDelegate = 
(MyAppDelegate *)[[UIApplication sharedApplication] delegate];
        [appDelegate initAndPlayMovie:[self localMovieURL]];
    }
}

MyAppDelegate:

-(void)initAndPlayMovie:(NSURL *)movieURL
{
    // Initialize a movie player object with the specified URL
    MPMoviePlayerController *mp = [[MPMoviePlayerController alloc] initWithContentURL:movieURL];
    if (mp)
    {
        self.moviePlayer = mp;
        [mp release];       
            [self.moviePlayer play];
    }
}

I did some debugging in

- (void) moviePreloadDidFinish:(NSNotification*)notification {
   NSLog(@"moviePreloadDidFinish");
}

and in

- (void) moviePlayBackDidFinish:(NSNotification*)notification {
   NSLog(@"moviePlayBackDidFinish");
}

I noticed that the movie loads correctly and plays, I guess somewhere in the background, for the appropriate amount of time, but I just can't see the Movie Player. The view never changes from my TableViewController!

Any Ideas? Please help!!!