I have a client who wants me to setup a subdomain on one of his domains. As it currently stands, he has one domain setup as the server's hostname, which he has at godaddy (but pointed to the correct IP - he doesn't use godaddy hosting), and several other domains which were created as addon domains. I need to have a subdomain on an addon domain. I tried creating the subdomain normally, but that doesn't resolve to anything. There were no errors upon creation either, and the directory was created as per normal. How can I create a subdomain on one of the addon domains?