FTP 550 error - Permission denied

Include /etc/proftpd/modules.conf

UseIPv6				on
IdentLookups off

ServerName			"Debian"
ServerType standalone
DeferWelcome off

MultilineRFC2228 on
DefaultServer on
ShowSymlinks on

TimeoutNoTransfer 600
TimeoutStalled 600
TimeoutIdle 1200

DisplayLogin                    welcome.msg
DisplayChdir .message true
ListOptions "-l"

DenyFilter \*.*/

Port 21

<IfModule mod_dynmasq.c>
</IfModule>

User				proftpd
Group				nogroup

Umask 022 022
AllowOverwrite on

TransferLog /var/log/proftpd/xferlog
SystemLog   /var/log/proftpd/proftpd.log
<IfModule mod_quotatab.c>
QuotaEngine off
</IfModule>

<IfModule mod_ratio.c>
Ratios off
</IfModule>
<IfModule mod_delay.c>
DelayEngine on
</IfModule>

<IfModule mod_ctrls.c>
ControlsEngine        off
ControlsMaxClients    2
ControlsLog           /var/log/proftpd/controls.log
ControlsInterval      5
ControlsSocket        /var/run/proftpd/proftpd.sock
</IfModule>

<IfModule mod_ctrls_admin.c>
AdminControlsEngine off
</IfModule>

Include /etc/proftpd/conf.d/
<Global>
DefaultRoot /home/my_virtualserverfolder virtualserver_user
AllowRetrieveRestart on
AllowStoreRestart on
AllowOverwrite on
</Global>
<Directory />
AllowOverwrite on
</Directory>
DefaultRoot ~
AllowRetrieveRestart on
AllowStoreRestart on
AllowOverwrite on