dataTables.net onload scroll to bottom of table - how? no method i've tried works

I am loading up a ledger page and utilisng the dataTables function (whcih i've used throughout my site) however I need the ledger which could have thousands of rows to scroll immediately to the bottom which shows the newest record.

I am not able to sort by descending as that is not how a ledger works, I could use pagination but could not work out how to execute 'last page' automatically.

I have tried a few variations of scrollTop but nothign seems to work. My data is loaded from a php array.

<script>
$(document).ready(function() {
    $("#PayMasterResults").dataTable( {
    "sPaginationType": "full_numbers",
    "bPaginate": false,
    "bJQueryUI" : true,
    "sScrollY": "215",
    "bLengthChange": true,
    "bFilter": true,
    "bSort": false,
    "bInfo": true,
    "bAutoWidth": false,
    "sDom": \'<"H"lTfr>t<"F"ip>\',
    "oTableTools": {
            "sSwfPath": "lib/copy_csv_xls_pdf.swf",
            "sRowSelect": "multi",
            "aButtons": [
                    "print",
                    {
                            "sExtends": "copy",
                            "sButtonText": "Copy to clipboard"
                    },
                    {
                            "sExtends": "csv",
                            "sButtonText": "Export CSV"
                    },
                    {
                            "sExtends": "xls",
                            "sButtonText": "Save for Excel"
                    },
                    {
                            "sExtends": "pdf",
                            "sButtonText": "Save to PDF",
                            "sPdfOrientation": "landscape",
                    }
            ]
    }
} );
});
</script>

and the html/php displaying the table is as follows :

 <div class="table">
            <table class="display" id="PayMasterResults">
                    <thead>
                            <tr>
                             <th class="" width="600px"><b>Entry Description</b></th>
                             <th class=""><b>Entry Timestamp</b></th>
                             <th class=""><b>Debit/Credit</b></th>
                             <th class=""><b>Running Balance</b></th>
                            </tr>
                    </thead>
                    <tbody>
            ';
            for($x=0; $x<$xmldata->Ledger->count(); $x++) {
                    echo '
                            <tr class="gradeB">
                             <td><a href="#" onclick="loadPMLedgerDetail(\''.$xmldata->Ledger[$x]->attributes()->ID.'\',\''.$_POST['ID'].'\');">'.$xmldata->Ledger[$x]->Description.'</a></td>
                             <td>'.$xmldata->Ledger[$x]->Stamp.'</td>
                             <Td>'.$xmldata->Ledger[$x]->Amount.'</td>
                             <td>'.$xmldata->Ledger[$x]->Balance.'</td>
                            </tr>
                    ';
            }
            echo '
                    </tbody>
            </table>

            </div> <!-- End Table -->

I'm really stuck :(