hi everyone, everything works fine in localhost but i have a problem login from other browsers like safari and chrome, in firefox its ok. may be it is because of htaccess or may be other. i tried a lot searching but come to no solution. my htaccess file look like this.

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /


RewriteCond %{REQUEST_URI} ^system.*
RewriteRule ^(.*)$ /index.php?/$1 [L]
RewriteCond %{REQUEST_URI} ^application.*
RewriteRule ^(.*)$ /index.php?/$1 [L]

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php?/$1 [L]
</IfModule>

<IfModule !mod_rewrite.c>
    ErrorDocument 404 /index.php
</IfModule>

my server folder hirarchy looks like this

public_html
L application
  system
  css
  images
  .htaccess

application/config/config.php looks like this

$config['index_page'] = "index.php?";
$config['uri_protocol'] = 'QUERY_STRING';

any help?