problem: index.php still exist in after modifying .htaccess

[eluser]Alpha[/eluser]
My .htaccess is

RewriteEngine on
RewriteCond $1 !^(index\.php|robots\.txt)
RewriteRule ^(.*)$ /index.php/$1 [L]

but the controller still returns http://www.example.com/index.php/welcome.html

.htaccess is located with application folder, system folder and ci main index.php

welcome controller is in application->controllers folder

tnx