dynamically loaded checkbox not firing

Table loading using ajax bellow..

    $.ajax({

        type:"POST",
        url:"loadquestionsajax.php",
        data:"qcategory="+qcategory,
        dataType:"json",
        success: function(s){


           $.each(s,function(i,obj)
            {
                if(obj!=false){

           while(i<1){
              $("#t01").append("<tr>"+"<th><input type='checkbox' class='cbox' value=''/></th>"+"<th>Question ID</th>"+"<th>Question</th>"+"<th>Choice 1</th>"+"<th>Choice 2</th>"+"<th>Choice 3</th>"+"<th>Choice 4</th>"+"<th>Answer</th>"+"</tr>");

           i++;
           }



            $("#t01").append("<tr>"+"<td><input type='checkbox' name='qtns[]' class='cbox' value='"+obj[0]+"'/></td>"+"<td>"+obj[0]+"</td>"+"<td>"+obj[1]+"</td>"+"<td>"+obj[2]+"</td>"+"<td>"+obj[3]+"</td>"+"<td>"+obj[4]+"</td>"+"<td>"+obj[5]+"</td>"+"<td>"+obj[6]+"</td>"+"</tr>");


            }else{
                exit();
            }
          });


        }


    }); 

and my event handler is code bellow. ( it is not calling even checkbox checking.) Please help me. Thanks in Advance.

$(document).ready(function(){

    $(document).on('click', '.cbox', function(){
         alert('test');
    });

   }); 

and I used bellow code also.

$(document).ready(function(){

    $('.cbox').change(function(){   // .click also seen  but not workig.

        alert("hello")                        
      ;          

    });

   });