Something is wrong on their end. Our system can't see the name servers: https://bybyron.net/php/tools/dns_records.php?domain=itskara.cyou&rec=NS Neither can Google (enter your domain and click NS, it comes back SERVFAIL): https://toolbox.googleapps.com/apps/dig/ A correct domain will look like: https://bybyron.net/php/tools/dns_records.php?domain=heliohost.org&rec=NS You might want to try changing your main domain to that domain and see if it works instead. There's a few weird registrars that are "backwards" (they expect hosts to set up DNS first, when the industry standard is for the registrar to go first). Setting this domain as your main domain will force the registrar to set up if this is the case, after which you change the main domain back and add the alias/addon.