Show checked items in multiselect option

Hi
My multiselect option is below. Selected items is coming from “testdata.json” . But when The lightbox opened, selections is does not appear.
How to show selections in the multi select option???

My lightbox

var options = [
        {key: "sprechstunde", label: "Sprechstunde"},
        {key: "eeg", label: "EEG"},
        {key: "nlg", label: "NLG"},
        {key: "uU", label: "u.U."},
        {key: "gt", label: "GT"},
        {key: "mmpi", label: "MMPI"},
        {key: "rehacom", label: "RehaCom"},
        {key: "duplex", label: "Duplex"},
        {key: "pt", label: "PT"}];

    scheduler.config.lightbox.sections = [
        {
            name: "fruitselect",
            height: 100,
            map_to: "department",
            type: "multiselect",
            options: options ,
            script_url: 'testdata.json',
            vertical: "false"
        }
    ];

testdata.json

[
    {"key": "sprechstunde", "label": "Sprechstunde"},
    {"key": "eeg", "label": "EEG"},
]

Hi,
do you need these options to be selected initially, when new event is created?
If so, you may specify them in multiselect configurationscheduler.config.lightbox.sections = [ { name: "fruitselect", height: 100, map_to: "department", type: "multiselect", options: options , script_url: 'testdata.json', vertical: "false", default_value: "sprechstunde,eeg"//comma separated keys } ];script_url can be used to load whole list of options from the server, in case you don’t specify ‘options’. It can’t be used to select options in control

Hi,
I added “default_value” property as below but checked values did not come
Where am I doing wrong?
Thanks

    var options = [
                {key: "1", label: "Sprechstunde"},
                {key: "2", label: "EEG"},
                {key: "3", label: "NLG"},
                {key: "4", label: "u.U."},
                {key: "5", label: "GT"},
                {key: "6", label: "MMPI"},
                {key: "7", label: "RehaCom"},
                {key: "8", label: "Duplex"},
                {key: "9", label: "PT" }];

    scheduler.config.lightbox.sections = [
        {
            name: "description",
            height: 130,
            map_to: "text",
            type: "textarea",
            focus: true
        },
        {
            [b]name: "departmentselect",
            height: 100,
            map_to: "department",
            type: "multiselect",
            options: options,
            default_value: "1,2",
            vertical: "false"[/b]
        },
        {
            name: "recurring",
            height: 115,
            type: "recurring",
            map_to: "rec_type",
            button: "recurring"
        },
        {
            name: "time",
            height: 72,
            type: "time",
            map_to: "auto"
        }
    ];

Hi,
looks like multiselect does not handles ‘default_value’ config, sorry for the inconvenience.
Try assigning initial values directly to the event, right after it’s created: scheduler.attachEvent("onEventCreated", function(id){ scheduler.getEvent(id).department = "1,2"; });

Thanks for reply Aliaksandr
I added eventCreated Handler and the problem solved.
Thanks