aoColumns bug on IE7 and IE8

Those lines are not working on IE7 and IE8
It return javascript error.

"aoColumns": [
{ "bSortable": false },
{ "bSortable": false, "sWidth": "200px", "sClass": "datatables_center" },
{ "bSortable": false, "sWidth": "200px", "sClass": "datatables_center" },
],