No Longer Works – Breaks SIte

This used to work though on an older site, though when I tried to install it on a new site it broke the backend, resulting in a Internal Server Error 500.

The problem was eventually resolved by over-writing the .htaccess file.

# 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