datetimepicker format

Hi All.

I'm using Xceed.WPF.Toolkit. And would like to format DateTimePicker control like ShortDate and ShortTime together. When I tried:

<xctk:DateTimePicker Format="Custom"
                     FormatString="MM/dd/yyyy HH:mm"
                     TimeFormat="Custom"
                     TimeFormatString="HH:mm" />

and run form DateTimePicker dispalied value like 01/01/0001 00:00.

I would like to get current format, for instance, 09/11/2013 3:15 PM. How to get it?

Thanks.