mantis doesn't send commecnt

Hello.

Mantis doesn't send comments to e-mail.
It sends notifications for ticket status change, new ticket, closed
ticket, etc but not when users add comments to tickets.

Here is a part of config:

    $g_default_notify_flags = array('reporter'  => ON,
                                    'handler'   => ON,
                                    'monitor'   => ON,
                                    'bugnotes'  => ON,
                                    'threshold_min' => NOBODY,
                                    'threshold_max' => DEVELOPER);

What did I miss?
Thanks.

-- 
Kindly regards,
Gleb Voronich


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