Please help!

I created combo
Code:
                            {
                                xtype: 'combo',
                                listEmptyText: 'Выберите объект',
                                store: MyDesktop.ObjectsStore,
                                valueField:'name',
                                forceSelection:true,
                                pageSize:5,
                                autoShow: true,
                                displayField: 'name',
                                fieldLabel: 'Объект'
                            },
create MyDesktop.ObjectsStore
Code:
        MyDesktop.ObjectsStore = new Ext.data.DirectStore({
            api: {
                read: API_Objects.load,
            },
            storeId: 'ObjectsStore',
            autoLoad: true,
            triggerAction: 'all',
            typeAhead: true,
        });
Request to server send ok and result is ok. Json:
Code:
{"result":[{"id":1,"name":"dsafdsgfdsg"},{"id":2,"name":"ddddddddddd"},{"id":3,"name":"cccccccccccc"}],"id":"2","error":null}
But combo not show data!

-----------------------------------
Problem resolved. )))
add

minChars: 0,

in combo.