mod_rewrite htaccess for Permalinks

I have read all the most of the tutorial but i still cant get how to mod_rewrite htaccess so my permalinks with this structure work properly /%category%/%postname%/. At present if iu click next page its just coming up with an error

Below is how my htaccess look. Can you please advise me on what it should look like to enable the rewright

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

# END WordPress