[TEC] timer rule

I can set a timer without a problem.
set_timer(_event,60,'STOP'),
re_timer_description(_id,_ev,_dur,_info)

re_timer_description(_id,_ev,_dur,_info) shows me the timer is set. But it seems I don't get through the timer rule below.

File /tmp/STOP is never created.
Can somebody tells me what is wrong ?

timer_rule:stopmonitoring_timer:
(
        event: _tic of_class _class where [],
        timer_info: equals 'STOP',
        action:stopmonitoring_timer_1:
        (
                fopen(_fp,'/tmp/STOP',w),
                flisting(_fp,'STOP'),
                fclose(_fp),
                re_mark_as_modified(_oldev, _)
        )
).

Jean-Michel TURATI
Euro Disney SCA  Bâtiment Genie
BP 100  77777 Marne la Vallée Cedex 4
Tél: +(33).1.64.74.32.86 Fax: +(33).1.64.74.40.03