Problem with .htaccess on ubuntu (apache2)

[eluser]xxIdroxx[/eluser]
hello community!
Today I tried to put my site made ​​with CodeIgniter in Ubuntu but when I go to localhost / mysite / I see a blank page.
My files. Htaccess
I have enabled mod_rewrite

Code:

DirectoryIndex index.php
AddDefaultCharset utf-8
RewriteEngine on
RewriteCond $1 !^(index\.php|css|js|robots\.txt|favicon\.ico)
RewriteRule ^(.*)$ /index.php/$1 [L]