remove index.php from urls using apache httpd.conf

[eluser]omx[/eluser]
Hi, have viewed the wiki and after extensive googling I still can't get this to work...

Have inserted the following into my httpd.conf file (and yes mod_rewrite.so is enabled)

Code:

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteCond %{REQUEST_URI} !^(/index\.php|/img|/js|/css|/robots\.txt|/favicon\.ico)
RewriteRule ^(.*)$ /index.php/$1 [L]
</IfModule>

With this enabled I get a 404 when I point to:

http://localhost/CodeIgniter/index.php/welcome

Any ideas?

Cheers!