XF 1.5 Moving from a subdomain to another subdomain

Ok so I can't not find a topic for the life of me. I'm looking to switch my xenforo installation from a "forums" subdomain to a "gaming" subdomain. I renamed the htaccess.txt to .htaccess and removed the # comment the RewriteBase /xenforo and renamed it to /gaming. Still getting the "Internal Server Error" when Friendly URLS is enabled.

Any ideas?