Is it showing up in your control panel under Manage Domains?
Your description makes it sound like it isn’t, but the error sounds like a situation where if it is in your domains list, you can Edit the domain and then click Change Fully Hosted settings now! even though you didn’t make any changes. This fixes the “bad_httpd_conf” error people occasionally encounter.
Again, if it’s not showing up in your Manage Domains list, you’ll have to contact Support for them to work this out.