.htaccess it's hiding my folders in localhost - php

Question

I was making a .htaccess file to run a framework that I was testing, but when I tried to access to my localhost, the folder where is located the framework's files didn't show up.
If I try to access, requesting the localhost/my_hidden_folder/ this fires a 500 error, internal server error.
This behaviour is result of some wrong configuration with my apache|.htaccess, I'm pretty sure because the same .htaccess in another server works fine.
Here is my .htaccess:
RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-l
RewriteRule ^(.+)$ index.php?url=$1 [QSA,L]
And here is my default file from /etc/apache2/sites-available:
<VirtualHost *:80>
ServerAdmin webmaster#localhost
DocumentRoot /var/www
<Directory />
Options FollowSymLinks
AllowOverride None
</Directory>
<Directory /var/www/>
Options Indexes FollowSymLinks MultiViews
AllowOverride All
Order allow,deny
allow from all
</Directory>
<Directory /var/www/entrega2>
AllowOverride All
</Directory>
<Directory /var/www/unlp>
AllowOverride All
</Directory>
ScriptAlias /cgi-bin/ /usr/lib/cgi-bin/
<Directory "/usr/lib/cgi-bin">
AllowOverride None
Options +ExecCGI -MultiViews +SymLinksIfOwnerMatch
Order allow,deny
Allow from all
</Directory>
ErrorLog ${APACHE_LOG_DIR}/error.log
# Possible values include: debug, info, notice, warn, error, crit,
# alert, emerg.
LogLevel warn
CustomLog ${APACHE_LOG_DIR}/access.log combined
</VirtualHost>
Both folders, /var/www/unlp and /var/www/entrega2 have the same .htaccess file, and both are hidden.
The most basic redirect in the .htacces file doesn't work, in my localhost, but in the server works. Maybe I have a module disabled?

Answer 1

Is there a +FollowSymlinks in .htaccess? This usually does the 500 error on Linux systems that have already activated the option or on Windows.

Answer 2

Try to run phpinfo() to make sure the mod-rewrite is activated.
Create simple php file in your web root folder, which contains:
<?php
phpinfo();
?>