accessing dynamically created class problem

accessing dynamically created class problem

Hi, i have input elements with a class "c10_3" created by this code:
$('#myTable :not(:first)TR').each(function() {
             
              $(this).append('<td align="center"> <input  class="c10_3"  type="checkbox"  /> </td>');
             
 });

but now i can't access it with:

$("input[class='aaa']").click(function() {

alert('hi');

});

what i'm doing wrong?

thanks in advance!