Hidden columns shown during the loading

Hi,

I am using datatables with hidden columns inside, and it works fine. I am populating the table through php code. The problem is that when I load the page, for a couple of seconds (the time to load the data), the table is shown with the hidden column and without the proper css.

Below there is my datatable code:

var myTable = $('#my_table').dataTable({
                    "bPaginate": false,
                    "bJQueryUI": true,
                    "bInfo": false,
                    "bFilter": false, 
                    "bAutoWidth": false,
                    "aoColumns":
                    [
                            { "bVisible": false},
                            null, 
                            null, 
                            null, 
                            null, 
                           null,
                            { "bSortable": false }, 
                            null, 
                            null, 
                            { "bSortable": false }
                    ],
                    "aaSorting": 
                    [
                            [0,'desc'],[4, 'asc'],[5, 'desc']
                    ],
                    "fnRowCallback": function( nRow, aData, iDisplayIndex ) 
                    {
                        var tds = $(nRow).children();
                        $(tds[0]).removeClass();
                        $(tds[0]).addClass("l pad_left5 pointer size25 c"); // name
                        return nRow;
                    }
            }); // dataTable

Thank you very much