Почему не загружает json?

ymaps.ready(init);

function init () {
    var myMap = new ymaps.Map('map', {
            center: [55.76, 37.64],
            zoom: 10
        }),
        objectManager = new ymaps.ObjectManager({
            clusterize: true,
            gridSize: 32
        });
    objectManager.objects.options.set('preset', 'islands#greenDotIcon');
    objectManager.clusters.options.set('preset', 'islands#greenClusterIcons');
    myMap.geoObjects.add(objectManager);

    $.ajax({
        url: "file:///C:/Users/home/Desktop/json/data.json",
        dataType: "json",
        success: toJsonContainer
    }).done(function(data) {
        objectManager.add(data);
    });

}