Reset datetimepicker?

Reset datetimepicker?

Hello
I have included the datetimepciker plugin from;
http://xdsoft.net/jqplugins/datetimepicker/

There is a little problem.
If you set a date e.g. 31.03.2014 and time 02:00, submit the form and then open the calendar again, the date is not set to current date 04.03.2014. It shows always the previos selected date and time.
Is there a way to reset the date and time?
I tried:

$('#datetimepicker3').datetimepicker({
                value: null,
                inline:true,
                lang:'de'
            });

but this do not the trick

regards
Hans