Scoller extra not working

mmster55

For some reason, the DataTable Scroller extra is not working and it's driving me crazy!

[code]
$("#segsMappedView").dataTable({
"aaData": mappingArray,
"bDestroy" : true,
"bLengthChange": false,
"bFilter": false,
"bAutoWidth": false,
"aoColumns": dtCols,
"sScrollY": "250px",
"bInfo": false,
"bPaginate": false,
"bScrollCollapse": true,
"sDom" : "tS",
"bDeferRender" : true
});
[/code]

I'm using DataTables 1.8.2 and the Scroller.js plugin.

I'm checking that the scroller is not working by running a

[code]
$('.dtResults').find('tr').length
[/code]

which returns 6K rows.

What am I doing wrong?