How to remove index.php from URL

[eluser]Unknown[/eluser]
Hi Guys

My .htaccess file looks something like this

>>>>>>>>>>


RewriteEngine on
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule .* index.php/$0 [PT,L]


>> n still when I try to acess like http://localhost/CodeIgniter/welcome
Its showing not found..

i have added the .htacess i root folder..
Can anyone help me in this regards..