DrawCallBack in CDF

Hi all,
I'm using pentaho CDF to develop some dashboards. I have a question related to the DataTables behind the table component.
After the table is initialized by the Dashboard I'm not able to call a "drawCallBack" in order to apply some changes to the returned table.

Find below the code which I'm using in the postExecution of my table definition:

Is the correct way to access a pre-instanciated table?

$('#obj_tabTable').dataTable({"bRetrieve":true}, {
"fnDrawCallback": function( oSettings ) {
alert( 'DataTables has redrawn the table' );
}

Any help is appreciated.
Nico