proftpd nega anonimos

pessoal, eu nao consigo me logar como anonimo, apenas com usuario normal, alguem sabe o pq?
minha conf esta abaixo:

# This is a basic ProFTPD configuration file (rename it to
# ´proftpd.conf´ for actual use. It establishes a single server
# and a single anonymous login. It assumes that you have a user/group
# "nobody" and "ftp" for normal operation and anon.

ServerName "Servidor de FTP"
ServerType standalone
DefaultServer on

# Port 21 is the standard FTP port.
Port 21

# Umask 022 is a good standard umask to prevent new dirs and files
# from being group and world writable.
Umask 022

# To prevent DoS attacks, set the maximum number of child processes
# to 30. If you need to allow more than 30 concurrent connections
# at once, simply increase this value. Note that this ONLY works
# in standalone mode, in inetd mode you should use an inetd server
# that allows you to limit maximum number of processes per service
# (such as xinetd).
MaxInstances 30

# Set the user and group under which the server will run.
User nobody
Group nogroup

# To cause every FTP user to be "jailed" (chrooted) into their home
# directory, uncomment this line.
DefaultRoot ~

# Normally, we want files to be overwriteable.
<Directory />
AllowOverwrite on
</Directory>

# A basic anonymous configuration, no upload directories. If you do not
# want anonymous users, simply delete this entire <Anonymous> section.
<Anonymous ~/var/ftp/>
#RequireValidShell no
AnonRequirePassword no
# Maximum clients with message
MaxClients 10 "Desculpe, numero maximo de clientes (%m)"

User ftp
Group ftp

# We want clients to be able to login with "anonymous" as well as "ftp"
UserAlias anonymous ftp

# Limit WRITE everywhere in the anonymous chroot
<Limit WRITE>
DenyAll
</Limit>
</Anonymous>

alguem sabe o pq?
nos logs soh mostra "session opened" e logo em seguida "session closed"

Versao 1.2.8 compilada.

Obrigado.