UIButton is not getting touch even in full area

I have UIBUtton in UICollectionViewCell as show in image. I had set touchUpInside Action in xib. I had set background image of button is pink and lable as yellow. UIButton comes at top of the label. Now the problem is that UIButton in not getting touch event in pink area it only get touch events on orange area. why it is so.

- (IBAction)checkButtonTap:(id)sender event:(id)event
{
    DLog(@"%s",__func__);
}