[horde] fullname on IMP H3 3.2.1

[fabricio bianco abreu]

> Have you activated your _prefs_hook_fullname function,
> in horde/conf/prefs.php?

What do you mean by "Have you activated your _prefs_hook_fullname function,
in horde/conf/prefs.php?"

In horde/conf/prefs.php I have:

// user full name for From: line
// If you lock this preference, you must specify a value or a hook for it in
// horde/config/hooks.php.
$_prefs['fullname'] = array(
    'value' => '',
    'locked' => true,    'shared' => true,
    'type' => 'text',
    'desc' => _("Your full name:")
);

In horde/conf/hooks.php I have:

 if (!function_exists('_prefs_hook_fullname')) {
     function _prefs_hook_fullname($user = null)
     {
         $ldapServer = 'marte2.tcdf.net';
         $ldapPort = '389';
         $searchBase = 'ou=User,dc=tcdf,dc=net';
         $ldapcharset = 'ascii'; // 'utf-8';
         $outputcharset = NLS::getCharset();

         $ds = @ldap_connect($ldapServer, $ldapPort);

         if (is_null($user)) {
             $user = Auth::getAuth();
         }
         $searchResult = @ldap_search($ds, $searchBase, 'uid=' . $user);
         $information = @ldap_get_entries($ds, $searchResult);
         $name = $information[0]['cn'][0];

         ldap_close($ds);

         $name = String::convertCharset($name, $ldapcharset, $outputcharset);
         return (empty($name) ? $user : $name);
     }
 }

What am I missing?

By the way, I am using _username_hook_frombackend and _username_hook_tobackend
so that upon login, on horde panel users are greeted with the message "Welcome,
user at mydomain". Does it intefere with IMP's from field when composing a message?

Thanks in advance,