IE8 Stop Script Pop up message

I keep getting the stop script message for my table when rows are around 1500 rows. I am using deferred rendering and turned off bsort (advice from other forum posts). Even when the Json data is cached I get that message. The thing is right after you click "No" the table appears and everything.

The odd thing is that when the cache is cleared it takes a lot longer before the stop script message pops up, this makes me assume it is not the data fetching causing the message. I could be wrong.

I can't really post a live working version of the table due to information legal tape, etc. but I will try to post what I can

Initialisation Options:
*i edited some parts to keep information private

{
    "bAutoWidth": false,
    "bStateSave": true,
    "bSortClasses": false,
    "bJQueryUI": true,
    "bProcessing": true,
    "aoData": [{}],
    "sScrollY": "375px",
    "sAjaxSource": "...........",
    "bDeferRender": true,
    "sAjaxDataProp": "invs",
    "aoColumnDefs": [{
        "fnRender": "function (oObj) {
    return \"<a href=\\\"\" + oObj.aData.invid + \"/investigators/\" + oObj.aData.inv.id + \"\\\" target=\\\"_blank\\\">\" + oObj.aData. + \"</a>\";
}",
        "iDataSort": 8,
        "aTargets": [0]
    }],
    "aoColumns": [{...column data...}],
    "bScrollCollapse": true,
    "sDom": "<\"class\"C>T<\"clear\">lrtipS",
    "oTableTools": {
        "sSwfPath": "https://website.com/swf/copy_csv_xls_pdf.swf",
        "sRowSelect": "multi",
        "aButtons": [{
            "sExtends": "copy",
            "bSelectedOnly": "true"
        }, {
            "sExtends": "csv",
            "bSelectedOnly": "true"
        }, {
            "sExtends": "xls",
            "bSelectedOnly": "true"
        }, {
            "sExtends": "text",
            "sButtonText": "Select Visible",
            "fnClick": "function (nButton, oConfig, oFlash) {
    var oTT = TableTools.fnGetInstance(\"sort_table\");
    var data = oTable.$(\"tr\", {filter: \"applied\"});
    for (var i = 0; i < data.length; i++) {
        if (!oTT.fnIsSelected(data[i])) {
            oTT.fnSelect(data[i]);
        }
    }
}"
        }, "select_none",
        {
            "sExtends": "csv",
            "sButtonText": "Export All Investigators",
            "bSelectedOnly": "none"
        }]
    },
    "oColVis": {
        "bCssPosition": true,
        "sSize": "css",
        "aiExclude": [0, 1, 8],
        "fnStateChange": "function () {
    oFC.fnUpdate();
    var h = $(\".dataTables_scrollHeadInner tr.ntrow\").height();
    $(\".DTFC_LeftHeadWrapper tr.ntrow\").css(\"height\", h);
    redraw_st();
}"
    },
    "sScrollX": "1600px",
    "iDisplayLength": -1,
    "aLengthMenu": [
        [-1],
        ["All"]
    ],
    "sPaginationType": "full_numbers",
    "fnInitComplete": "function () {
    oTable.fnAdjustColumnSizing();
    $(\"#sort_table\").hide();
    $(\"#sort_table\").hide();
    $(\"#sort_table\").show();
    $(\"#sort_table\").show();
}",
    "fnRowCallback": "function (oSettings) {
    $(\"#sort_table\").hide();
    $(\"#sort_table\").hide();
    $(\"#sort_table\").show();
    $(\"#sort_table\").show();
}"
}

Any advice or help will be greatly appreciated. I just want the error message to stop appearing or to just some how make it automatically be clicked to No.
If more information is needed I will be happy to provide what I can give out
Thanks in Advance