[Exim] Mailman config for exim

Hi, I just installed mailman and I followed the directions on
http://www.exim.org/howto/mailman.html
but unfortunately this doesnt work... when I try to send mail to a normal
user I get:

mail micah
Subject: test
test
.
Cc:
riseup:/usr/doc/mailman# 2000-04-26 11:59:52 Exim configuration error
director list_transport: cannot find director driver "pipe" in line 260

From the exim.conf (I commented iut out so that normal mail will work), I
have, directly from the web page:

#list_transport:
#           driver = pipe
#           command = MAILMAN_WRAP post ${lc:$local_part}            
#           current_directory = MAILMAN_HOME
#           home_directory = MAILMAN_HOME
#           user = MAILMAN_UID
#           group = MAILMAN_GID

Up further I've got:

# home dir for mailman
MAILMAN_HOME=/var/lib/mailman
# wrapper script for mailman
MAILMAN_WRAP=MAILMAN_HOME/mail/wrapper
# user and group for mailman
MAILMAN_UID=list
MAILMAN_GID=list

ls -ld /var/lib/mailman
drwxrwsr-x    6 root     list         1024 Apr 26 10:24 /var/lib/mailman
ls -l /var/lib/mailman/mail/wrapper
-rwxr-sr-x    1 root     list         5512 Apr 15 18:22
/var/lib/mailman/mail/wrapper

grep list /etc/passwd
list:x:38:38:SmartList:/var/list:/bin/sh
riseup:/usr/doc/mailman# grep list /etc/group
list:x:38