Unable to sort when using the plugin

[GoogleCodeExporter]

What steps will reproduce the problem?
1.
.dataTable( {
       "jQueryUI": true,
        "scrollX": "100%",
         "scrollY": "50%",
         "scrollCollapse": true,
         "paging": false,
          "info": false,
          "columns": columns
        }).rowGrouping({

              bExpandableGrouping: true,                
              iGroupingColumnIndex: 2,
              iGroupingOrderByColumnIndex: 0,
              sGroupingColumnSortDirection: "asc"
2.
3.

What is the expected output? What do you see instead?
Everything seems to work fine, except column sorting is not happening.
Clicking the columns does nothing.

What version of the product are you using? On what operating system?
* File:        jquery.dataTables.grouping.js
* Version:     1.2.9.

DataTables 1.10.4
Please provide any additional information below.

Do you have any example to use with DataTables 1.10 or above?

Original issue reported on code.google.com by waterlil...@gmail.com on 20 Mar 2015 at 4:27