query string broken after enable pretty url

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Hi all,
This is the problem: I am losing the url query string after enable pretty url. I enabled the pretty url from dashboard, modified the .htaccess file, and modified config/base.php and libraries/request.php to redirec always to pretty url and remove index.php from the URL. I created too a file called config/site_post.php to force concrete5 Pages to Display at One URL (redirect cID to pretty url).

I must to say that in the problem is present only in the server because in local all is working well.
this is the local configuration:
System Linux
Server API Apache 2.0 Handler
Configuration File (php.ini) Path /etc/php5/apache2

this is the server configuration:
System Linux
Server API CGI/FastCGI
Configuration File (php.ini) Path /etc/php5/cgi

bellow the code:
.htaccess in local
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
#remove /index.php from home url and redirect to root. ej: http:mysite.local/index.php a http:mysite.local/ 
RewriteCond %{THE_REQUEST} ^.*\/index\.php?\ HTTP/
RewriteRule ^(.*)index\.php?$ "/$1" [R=301,L]
#pretty url senza index.php
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php/$1 [L]
#rewrite to handle some permalink
RewriteRule ^([^/]+)/info/([a-zA-Z0-9\-]+)/([0-9]+) /info/?proxy=true&idobj=$3 [L]


I must to change the .htaccess in the server in order to make it run:
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
#remove /index.php from home url and redirect to root. ej:http://mysite.local/index.php ahttp://mysite.local/ 
RewriteCond %{THE_REQUEST} ^.*\/index\.php?\ HTTP/
RewriteRule ^(.*)index\.php?$ "/$1" [R=301,L]
#pretty url senza index.php
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule .* index.php [PT,QSA,L]
#rewrite to handle some permalink saved on my db. http://mysite.local/info/permalink/1...  http://mysite.local/info/proxy=true&idobj=1...
RewriteRule ^([^/]+)/info/([a-zA-Z0-9\-]+)/([0-9]+) /info/?proxy=true&idobj=$3 [L]


local libraires/request.php
public static function get() {
      static $req;
      if (!isset($req)) {         
         $path = false;
         if (defined('SERVER_PATH_VARIABLE')) {
            $path = Request::parsePathFromRequest(SERVER_PATH_VARIABLE);
         }
         if (!$path) {
            $path = Request::parsePathFromRequest('ORIG_PATH_INFO');
         }
         if (!$path) {
            $path = Request::parsePathFromRequest('PATH_INFO');
         }
         if (!$path) {
            $path = Request::parsePathFromRequest('SCRIPT_NAME');



server libraires/request.php
public static function get() {
      static $req;
      if (!isset($req)) {         
         $path = false;
         if (defined('SERVER_PATH_VARIABLE')) {
            $path = Request::parsePathFromRequest(SERVER_PATH_VARIABLE);
         }
         if (!$path) {
            //$path = Request::parsePathFromRequest('ORIG_PATH_INFO');
            $path = Request::parsePathFromRequest('REDIRECT_SCRIPT_URL');
         }
         if (!$path) {
            $path = Request::parsePathFromRequest('PATH_INFO');
         }
         if (!$path) {

after this modification i am able to access to my site.

config/site_post.php
<?php
 $req = Request::get();
      if ($req->getRequestCollectionID() > 1 && $req->getRequestPath() == '' 
         && $_SERVER['REQUEST_METHOD'] != 'POST' && !(Page::getByID($req->getRequestCollectionID())->isExternalLink())) {
      // This is a request that is directly for the cID, rather than the path
      $u = new User();
      // If the user is logged in we do NOT redirect
      if (!$u->isRegistered()) {
         // Get the page object for the current cID
         $c = Page::getByID($req->getRequestCollectionID());
         if (!$c->isError() ) {
            $nav = Loader::helper('navigation');
            header ('HTTP/1.1 301 Moved Permanently');
            header('Location: ' . $nav->getLinkToCollection($c, true));
            exit;


config/base.php
defined('C5_EXECUTE') or die("Access Denied.");
if (!defined('DISPATCHER_FILENAME')) {
//   define('DISPATCHER_FILENAME', 'index.php');
   if(!defined(URL_REWRITING_ALL)){
      define('DISPATCHER_FILENAME', 'index.php');
   } else {
      define('DISPATCHER_FILENAME', ' ');
   }
}


as I said earlier, in local it is working well. If I do a vardump of $_GET on http://mysite.local/info/permalink/1... I can get an array whit proxy=true and idobj=1. In the server If I do a vardump I get an empty array.

what's wrong on server? Any help would be much appreciated.