404 Error File Not Found--on codelginiter 1.7.3

[eluser]Unknown[/eluser]
pleasse help me .I am new in codelgniter..am trying to devlop a website in codelgniter.

my base url is

$config[‘base_url’] = ‘http://www.billbahadur.com/demo/klickchakra/adiministrator/’;

$config[‘uri_protocol’] = ‘AUTO’;

my server url is

http://www.billbahadur.com/demo/klickcha....php/login

htaccess is

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


bu am getting an error “404 Error File Not Found”—please help me