550 file upload error in filezilla or proftpd

1) sudo nano /etc/proftpd/proftpd.conf
 Then make sure off to UseIPv6 to off

2) Make sure
DefaultRoot   /var/www
user           nobody
usergroup     nogroup
 <Directory ~/*>
AllowOverwrite on
</Directory>

Then give a restart
sudo /etc/init.d/proftpd restart

Then fix the file permission issue with ftp

sudo chown -R user:group directory
sudo chmod -R g+rw directory

That's all ... Rocking :)