limited area of draggability

[taula50]

when i fix contaiment: "#somediv" and it is fixed for every draggable element, only the first one dragged is limited to the area selected:
$(document).ready(function(){
$(".lo_que_sea").multiDraggable({

contaiment: '#wrapping',
scroll: false
}).mousemove(function(event , ui){
           var coord = $(this).position();
           var width = $(this).width();
           var height = $(this).height();
            $("#position").text( "(" + coord.left + "," + coord.top + ")" );

}).mouseup(function(event, ui){
var coord = $(this).position();
var width = $(this).width();
var height = $(this).height();

});

$(".otr_interior").multiDraggable({
containment: '#wrapping',
scroll: false
}).mousemove(function(){
var coord = $(this).position();
var width = $(this).width();
var height = $(this).height();
$("#position1").text( "(" + coord.left + "," + coord.top + ")" );
}).mouseup(function(){
var coord = $(this).position();
var width = $(this).width();
var height = $(this).height();

});

whats wrong???
});