Use fnGetData w/Ajax data source

The example in the documentation to get TR data when clicked works perfectly using DOM data source, but fails to get row data when using Ajax data source. Should oTable.$('tr').click function be inside fnInitComplete function, and if so, how to make it work?

The example says:
// Row data
$(document).ready(function() {
oTable = $('#example').dataTable();

oTable.$('tr').click( function () {
var data = oTable.fnGetData( this );
// ... do something with the array / object of data for the row
} );
} );