Hello all after some problem with installation of ossn (Mod_Rewrite required)
I have find the solution !

Tutorial for load mod_rewrite on apache2 (vps) :

First install the apache with this command:

apt-get install apache2

Now use locate to find if the mod_rewrite.so is availble on your server:

updatedb
locate mod_rewrite.so

it will found in “/usr/lib/apache2/modules”
New apache follow some folders to enable and disable mods so now do this:

cd /etc/apache2/mods-enabled
touch rewrite.load
vim rewrite.load (you may use any editor to edit this file)

Now paste this following line:

LoadModule rewritemodule /usr/lib/apache2/modules/modrewrite.so

Then edit:

/etc/apache2/sites-available/default

Find the following:

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

and change it to

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

and finally restart Apache:

/etc/init.d/apache2 restart

And it work !