addSubView to UIButton

I'm trying to add subviews to a UIButton. This is working fine right now. But the button isn't clickable anymore as soon as I add the subviews.

I use the following code:

UIButton * button = [UIButton buttonWithType:UIButtonTypeCustom];
    button.frame = CGRectMake(column*100+24, row*80+10, 64, 64);
[button addSubview:asyncImage];
[button addSubview:price];
    [button addTarget:self 
               action:@selector(buttonClicked:) 
     forControlEvents:UIControlEventTouchUpInside];

The button works again if I cut out the 2 addsubviews. If anyone knows how to fix this it would be great!

THNX!!!