help: triggers

hello,

I'm trying to update a columm on a table with a trigger
but it don't work on PostgreSQL 7.2 (i686-pc-linux-gnu, compiled by GCC
2.96).

when I update a row the trigger does nothing.
what can I do?

thanks in advance

tony

here is my trigger:

########################################################
CREATE FUNCTION update_my_objekt() RETURNS OPAQUE AS '
BEGIN
RAISE NOTICE ''My Trigger is updating the table'';
IF OLD.status=''Activo'' THEN
NEW.tempo := 10;
NEW.actual := now();
END IF;
RETURN NEW;
END;
' LANGUAGE 'plpgsql';

CREATE TRIGGER update_online BEFORE UPDATE ON iobjects
FOR EACH ROW EXECUTE PROCEDURE update_my_objekt();

##########################################################