proftpd 업로드가 안됩니다

proftpd를 설치하고 환경 설정후에 game이라는 계정으로만 ftp를 운영하려고 하는데요, 계정에서 업로드 할 경우 no space left 라는 메세지와 함께 업로드가 안됩니다. 다른 계정도 마찬가지더군요. 물론 디스크가 꽉 차지는 않았는데 말이지요; 어떻게 해결해야 하나요?

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ServerName "RIPUD's FTP"
ServerType standalone
DefaultServer on
ServerIdent on "RIPUD's FTPserver ready..."
RootLogin off
TimesGMT off
MaxClientsPerHost 1 "다중접속은 허용하지 않습니다"
MaxHostsPerUser 4 "사람이 많아 접속이 불가능합니다. 다음 기회를..."
TimeoutIdle 300
DeferWelcome off
<Limit LOGIN>
Order Allow,Deny
Allow from XXX.XXX.
Deny from all
</Limit>
<Directory /home/>
<Limit WRITE>
AllowAll
</Limit>
</Directory>
<Directory /mnt/ftp/>
<Limit WRITE>
DenyAll
</Limit>
<Limit READ>
AllowAll
</Limit>
</Directory>
<Directory /mnt/ftp/upload/>
<Limit WRITE>
AllowAll
</Limit>
<Limit READ>
AllowAll
</Limit>
</Directory>

# 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 nobody

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

# Normally, we want files to be overwriteable.
AllowOverwrite on

# Bar use of SITE CHMOD by default
<Limit SITE_CHMOD>
DenyAll
</Limit>

# A basic anonymous configuration, no upload directories. If you do not
# want anonymous users, simply delete this entire <Anonymous> section.
<Anonymous ~ftp>
</Anonymous>