PHP5.4.6 & Apache2.2.22 Issue ???!!!!!

[eluser]Horvat[/eluser]
Recently I installed Ubuntu 12.10(64bit)on my pc, and i have a problem with loading FW webpages,
if there some concrete php file it will load it.

BUT, if its from (for example: CodeIginter FW)

Code:

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
class Site extends CI_Controller {

  function __construct() {
    parent::__construct();
  }

  public function index() {
    $data["content"] = "site/index_view";
    $this->load->view("template/layout", $data);
  }

  public function other() {
    $data["content"] = "site/other_view";
    $this->load->view("template/layout", $data);
  }

}

if I Put http://localhost/CodeIgniter_Test/CodeIg...site/index or http://localhost/CodeIgniter_Test/CodeIg...site/other I have 404 error, WHY IS PHP NOT WORKING RIGHT??!?!?!