Show image from url in uiimageview

I am trying to show an image in my iphone application but it is not showing. I am connecting in IB and I am checking to show the local image, this is good. I also check the url from the image and everything is fine. I am using the following code:

NSURL *imageURL = [NSURL URLWithString: aVideo.urlThumbnail];
NSData *imageData = [NSData dataWithContentsOfURL:imageURL];
UIImage *image = [UIImage imageWithData:imageData]; 
imageView.image = image;

      

        
        
        
      

    

and

//Video.h
NSString *urlThumbnail;

      

        
        
        
      

    

and this is my code in view.

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];
    [tableView reloadData];
}

- (void)viewDidLoad {
    [super viewDidLoad];

    NSLog(@"URLTHUMBNAIL: %@", aVideo.urlThumbnail); 
    NSURL *imageURL = [NSURL URLWithString: aVideo.urlThumbnail];
    NSData *imageData = [NSData dataWithContentsOfURL:imageURL];
    UIImage *image = [UIImage imageWithData:imageData]; 
    imageView.image = image;
}

      

        
        
        
      

    

NSLog getts on console

URLTHUMBNAIL: http://147.83.74.180/thumbnails/56.jpg

      

        
        
        
      

    

Connections on IB are ok because I can display a local image using the following code on the same IBAction

UIImage *img = [UIImage imageWithContentsOfFile: [[NSBundle mainBundle] pathForResource:@"barret" ofType:@"png"]];