Why my Chechbokes select on loading doesn't work?

I'm trying to use the checkbox into checked when the check field of the DataTable is equal to "Checked". The code present here prints the values ​​in the table and the respective checkboxes connected to the Id, in this case the "IdTest" set as "RowId." Can anyone help me?

This is the JS:

var table = $('#list2').DataTable({
'scrollX': true,
'bSort': false,
'rowId': "IdTestResult",
'ajax': "/nc/get_list/<?php echo $SN; ?>",
'initComplete': function(settings) {
    var api = this.api();

    api.cells(
        api.rows(function(idx, data, node) {
            return (data[3] === 'Checked') ? true : false;
        }).indexes(),
        0
    ).checkboxes.select();
},
'columnDefs': [{
    'targets': 0,
    'checkboxes': {
        'selectRow': true
    }
}],
columns: [{
        data: "RowId"
    },
    {
        data: "Num"
    },
    {
        data: "Description"
    },
    {
        data: "Check"
    }
],
'select': {
    'style': 'multi'
},

'order': [
    [1, 'asc']
],
"searching": false,
"paging": false,
"info": false

});



    // Handle form submission event
    $('#frm-example').on('submit', function(e) {
var form = this;

var rows_selected = table.column(0).checkboxes.selected();

// Iterate over all selected checkboxes
$.each(rows_selected, function(index, rowId) {
    // Create a hidden element
    $(form).append(
        $('<input>')
        .attr('type', 'hidden')
        .attr('name', 'id[]')
        .val(rowId)
    );
});

});