[jQuery] slideUp() does not make animation before remove() occurs

[Massimiliano Marini]

Hi all,

I'm using jQuery 1.3.2 that's the code: 

function removeChekbox(data){
 $.each(data, function(i, val){                                                 
        
  $('input[value="'+val+'"]').parents(".item-container").animate({opacity: 
0.0}, "slow", function(){
   $(this).slideUp("slow", function(){
    $(this).remove();
   });
  });
 });
}

the code is correct, the remove() works well, but the slideUp() 
does not make the animation. Why?