Ok, so my htaccess code is jacked and leading to a 500 internal error at addison-homes.com and I don't know how to fix it...

AddHandler php-legacy .php

# 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

php_value upload_max_filesize 128M
php_value post_max_size 128M
php_value memory_limit 128M

# BEGIN (mt) controlled settings
AddHandler php-stable .php
# END (mt) controlled settings

What is making it go awry?