Problem removing index.php from url

[eluser]Ram2810[/eluser]
file floder structure

www(public_html)
application
assets
system
index.php
.htaccess

.htacess file

Code:

RewriteEngine on
RewriteCond $1 !^(index\.php|images|css|js|javascript|robots\.txt|favicon\.ico|license.txt)
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ ./index.php/$1 [L,QSA]

config.php details

Code:

$config['base_url']    = "http://localhost/lotus_ci";
$config['index_page'] = "index.php";
$config['uri_protocol']    = "AUTO";
$config['url_suffix'] = "";
$config['language']    = "english";
$config['charset'] = "UTF-8";
$config['enable_hooks'] = FALSE;
$config['subclass_prefix'] = 'MY_';
$config['permitted_uri_chars'] = 'a-z 0-9~%.:_\-';
$config['enable_query_strings'] = FALSE;
$config['controller_trigger']     = 'c';
$config['function_trigger']     = 'm';
$config['directory_trigger']     = 'd'; // experimental not currently in use
$config['log_threshold'] = 0;
$config['log_path'] = '';

.............
........

i hope you can help me out
thankyou