Cutom permalink Issue

Hello,
I have been trying to change my permalinks into something nicer for SEO purposes. the only one I can use is default, otherwise I get a error 404 in my portfolio. The custom permalink I want is /%postname%/

. I have looked online, and added:

# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ – [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>

# END WordPress

to my .htaccess file. It did not allow me to use my custom permalink.

My site is http://pranicspirit.com/

Pls help me asap..

Thanks.