you need to put this in your init.el (or other configuration file) I think:

(setq org-log-done 'time)

or add this to the top of the org-file
#+STARTUP: logdone



John

-----------------------------------
John Kitchin
Associate Professor
Doherty Hall A207F
Department of Chemical Engineering
Carnegie Mellon University
Pittsburgh, PA 15213
412-268-7803
http://kitchingroup.cheme.cmu.edu



On Fri, Dec 13, 2013 at 12:11 PM, Renato <renato.pontefice@gmail.com> wrote:

> Hi,
> as I already told, I'm a really newbe (to org-mode, as well as emacs)
> I'm starting from the very beginning:
> following the Doc (here: http://orgmode.org/worg/org-
> tutorials/orgtutorial_dto.html)
> I wrote my firs TODO list.
> But when I press C-c C-t over a TODO element, it appear DONE, write near
> the task, but not the CLOSED [time...] on the line after that.
>
> What I have to do?
>
> TIA
>
> Renato
>
> ps
> sorry, for the stupid question, but it is really my very firs experimet :-(
>
>