Dialog won't open on click when "autoOpen : false"

Dialog won't open on click when "autoOpen : false"

I have a dialog that works great when autoOpen = true, but when I set it equal to false, I can't open the dialog on the click of a specific button.

Firefox Firebug doesn't show anything on the error console. Am I missing something obvious?  Thanks

  2.  $(document).ready(function () {
  3.             $("#div_Detail").dialog({
  4.                 autoOpen: false,                
  5.                 buttons: {
  6.                     Ok: function () {
  7.                         $(this).dialog("close");
  8.                     }
  9.                 }
  10.             });

  12.             $("#lbSelect").click(function () {
  13.                 $("#div_Detail").dialog("open");
  14.                 return false;
  15.             });
  16.         });