Need help in htaccess

Hi All....

I have developed a portal in mvc and i am having problem in making the links SEF...
right now if i need to access controller and method i am following

(URL)/index.php?rt=CONTROLLER_NAME/METHOD_NAME

i want to make the above link SEF like
(URL)/CONTROLLER_NAME/METHOD_NAME

Below code i have it in my .htaccess file but when i tried to run it its saying INTERNAL SERVER ERROR

Thx in Adv..

.htaccess

RewriteEngine on
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php?rt=$1 [L,QSA]

Moving to Apache.

My guess is that you don't have mod_rewrite installed or enabled.