Sorting glyphs not showing up

jeanatliberty

I'm probably doing this incorrectly but, the sorting functionality is not showing up in my table.

I'm recreating the grid each time using a button to refresh the data. Button calls ajax, server returns json (data) and datatable is created.

$('#KRONOSData').dataTable(
{
"bSort": true,
"bLengthChange":false,
"bDestroy": true,
"aaData":data
,
"aoColumnDefs":
[
{ "mDataProp": "RecordID", "sWidth":"78px", "bVisible":false,"sTitle":"Record ID","aTargets":[0] },
{ "mDataProp": "LDAPID", "sWidth": "103px", "sTitle": "LDAPID", "bSortable":true, "aTargets": [1] },
{ "mDataProp": "CustDiv", "sWidth": "20px", "sTitle": "Div", "aTargets": [2] },
{ "mDataProp": "CustSerial", "sWidth": "80px", "sTitle": "Seral", "aTargets": [3] },
{ "mDataProp": "Customer", "sWidth": "209px", "sTitle": "Cust", "aTargets": [4] },
{ "mDataProp": "Employee", "sWidth": "221px", "sTitle": "Emp", "aTargets": [5] },
{ "mDataProp": "EmpEmail", "sWidth": "85px", "sTitle": "Emp Email", "aTargets": [6] },
{ "mDataProp": "EmpSSN", "sWidth": "97px", "sTitle": "Emp SSN", "aTargets": [7] },
{ "mDataProp": "EmpID", "sWidth": "88px", "sTitle": "Emp ID", "aTargets": [8] },
{ "mDataProp": "TimeStamp", "sWidth": "149px", "sTitle": "Time Stamp", "aTargets": [9] }
]

}
);

Any ideas? Working on explorer 7. DataTables 1.8.