Can`t select date after month

[Tsyklop]

I have next code:

$('form#edit-user-form input.birthday').datepicker({
format: "yyyy-mm-dd",
startView: 1,
minViewMode: 1,
changeMonth: true,
changeYear: true,
language: "ru",
calendarWeeks: true
});

I can select a month in year, but when i click on month nothing happens. Why? I use 1.7.1 version