Enable mod_rewrite for apache in Ubuntu.

sudo a2enmod rewrite
sudo /etc/init.d/apache2 restart
cd /etc/apache2/mods-enabled
grep mod_rewrite *

Fix these things

#sudo vi /etc/apache2/site-avaliable/default

then find the following

Options Indexes FollowSymLinks MultiViews
AllowOverride None
Order allow,deny
allow from all

Change it to

Options Indexes FollowSymLinks MultiViews
AllowOverride all
Order allow,deny
allow from all

Then restart your vsftp.