[horde] Hook question

[AJ]

Hi,
  I am trying to enable the fullname and from_addr hooks from the wiki.
I copied everything over, and made sure that hook => true in
horde/config/prefs.php, but the hooks just never fire.  I also cleared out the
prefs, so that it emulates the first login.  Does anyone know why these hooks
are not firing?  Any help w/ this would be great.  I am using the LDAP examples
from the wiki.

Thanks.
AJ