Dovecot not liking AD config from wiki??

Hi,

I'm trying to setup Dovecot with MS AD and am using this as my guide:

http://wiki2.dovecot.org/HowTo/ActiveDirectoryNtlm

I can definitely access information on the AD server using wbinfo -g
and wbinfo -u.....

Currently my dovecot.conf file looks like this:

# v1.1:
#auth_ntlm_use_winbind = yes
# v1.2+:
auth_use_winbind = yes

auth_winbind_helper_path = /usr/local/bin/ntlm_auth

protocols = imap

# It's nice to have separate log files for Dovecot. You could do this
# by changing syslog configuration also, but this is easier.
log_path = /var/log/dovecot.log
info_log_path = /var/log/dovecot-info.log

# Disable SSL for now.
ssl = no
disable_plaintext_auth = no

# We're using Maildir format