[imp] Can't get confirmation screen after composing a message??

[Krishna]

Hi,
     I don't get a confirmation screen after sending a message, though I 
have enabled it in the
the configuration file /horde/imp/config/prefs.php

$_prefs['compose_confirm'] = array(
'value' => 1,
'locked' => false,
'shared' => false,
'type' => 'checkbox',
'desc' => _("Display confirmation after sending a message?"));

regards
Krishna
http://www.KrisinDigitalAge.com