ProFTPD transfer failing

["Devon Harding" <devonharding@xxxxxxxxx>]

I'm using ProFTPD with the default setup & anonymous login as follows.  Users can access directories, but file transfers fails and downloaded files sizes are 0k.  What is causing this?

# A basic anonymous configuration, with an upload directory.
<Anonymous ~ftp>
  User                          ftp
  Group                         ftp
  AccessGrantMsg                "Warez login ok, restrictions apply."
  MaxClients                    5 "Sorry, max %m users -- try again later"
  <Limit WRITE SITE_CHMOD>
    DenyAll
  </Limit>
  <Directory Uploads/*>
    AllowOverwrite              no
    <Limit STOR>
      AllowAll
    </Limit>
  </Directory>
  WtmpLog                       off
  ExtendedLog           /var/log/proftpd/access.log WRITE,READ default
  ExtendedLog           /var/log/proftpd/auth.log AUTH auth
</Anonymous>