Seems I cannot check a checkbox in jQuery

[Krokonoster]

Here's the full plugin script. I'm not sure if it got anyhing to do with my content (the list with checkboxes) being loaded at runtime (asp.net mvc partial view)

plugin:

(function ($) {
    $.fn.extend({
        // Used to open a modal, listing all service providers
        // Callback will return selected service providers
        selectServiceProviders: function (options, callback) {
            var defaults = {
                url: '',                // must be set to url to action returning service providers selection form
                currentSelection: ''    // currently selected items 
            };
            options = $.extend(defaults, options);
            return this.each(function () {
                var url = options["url"];
                var currentSelection = options["currentSelection"].split(',');
                $('#modalContent', this).load(url);
                if (currentSelection != '') {
                    $('[name=selectedProviders]:checkbox').each(function () {
                        var id = $(this).attr("id");
                        if (jQuery.inArray(id, currentSelection) > -1) {
                            $(this).prop("checked", true);
                        }
                    });
                };
                $(this).modal('show');
                $(this).bind('hidden', function () {
                    if (typeof callback == 'function') {
                        var selectedIds = new Array();
                        var selectedNames = new Array();
                        $('input[name=selectedProviders]:checked').each(function () {
                            selectedIds.push($(this).attr('id'));
                            selectedNames.push($(this).attr('value'));
                        });
                        callback.call(this, selectedIds, selectedNames);
                    }
                });
            });
        }
    });
})(jQuery);

and the code in my view

$('#manageServiceProviders').click(function () {
    $('#modalTemplate').selectServiceProviders(
        {
            url: '@Url.Action(MVC.Admin.ServiceProvider.GetProviderListForSelection(Model.Partner.Id))',
            currentSelection: $('#SelectedProviderIds').val()
        },
        function (selectedIds, selectedNames) {
            $('#SelectedProviderIds').val(selectedIds);
            $('#SelectedProviderNames').text(selectedNames.join(", "));
        }
    );
    event.preventDefault();
});