Почему функция класса не вызывается через Ajax в Inte rnet Explorer 11?

Question

Это функция. js: -

function SaveMergeOrderSetting(obj) {
    debugger;
    try {
        if (obj != null) {
            //Block multiple events
            $(obj).addClass('disable-click');
        }
        var isOrderMergeConfigured = $("#ddlMergeOrderSettings").val();
        var IsOrderMerge = false;
        if (isOrderMergeConfigured == "True") {
            IsOrderMerge = true;
        }
        else {
            IsOrderMerge = false;
        }
        $.ajax({
            async: false,
            url: '/Store/CallOrderSettings/',
            data: { IsOrderMergeConfigured1: IsOrderMerge },
            success: function (data) {
                obj = data;
                if (obj == "True") {
                    closeConfirmPopup();
                }
                if (obj != null) {
                    //Block multiple events
                    $(obj).removeClass('disable-click');
                }
            }, error: function () {
                if (obj != null) {
                    //Block multiple events
                    $(obj).removeClass('disable-click');
                }
            }
        });

Это функция класса: -

public bool CallOrderSettings(bool IsOrderMergeConfigured)
{
    bool result = false;
    try
    {
    }
    catch
    {}
    return result;
 }