[dev] Fullname Hook not working?

[Mario Andres Yepes C]

Regards

I've sinked my horde installation with horde-cvs and now the 
_prefs_hook_fullname hook doesn't get called.

This is my setupt in horde/config/prefs.php

// user full name for From: line
$_prefs['fullname'] = array(
    'value' => '',
    'locked' => true,
    'shared' => true,
    'hook' => true,
    'type' => 'implicit');

is there something else I have to do???

Regards
Mario