我在这样的for循环中创建我的数组

historyArray[i] = {
    "User": strUserName,"Timestamp" : date.toString(),"Latitude" : point.lat,"Longitude" : point.lng
};

我的数据表实现：

$(document).ready(function() {
    $('#dynamic').html('<table cellpadding="0" cellspacing="0" border="0" class="display" id="report"></table>');
    $('#report').dataTable({
        "aaData": historyArray,"aoColumns": [
            { "mDataProp": "User" },{ "mDataProp": "Timestamp" },{ "mDataProp": "Latitude" },{ "mDataProp": "Longitude" }
        ],"bJQueryUI": true,"sPaginationType": "full_numbers","sDom": '<"H"Tfr>t<"F"ip>',"oTableTools": {
            "sSwfPath": "swf/copy_csv_xls_pdf.swf","aButtons": ["copy","csv","xls","pdf"]
        }
    }); 
});

我正确地获取数据,但没有列标题,我错过了什么？