I've added that domain to your account. Please note that it can take up to 2 hours to be fully working. If after 2 hours, it doesn't work on your side, please make sure you clear your web browser cache: https://wiki.helionet.org/misc/clear-your-cache
In the meantime, please either:
Point your domain to the HelioHost nameservers: `ns1.heliohost.org` and `ns2.heliohost.org`, or
Create an A record and point it to the IP address for the server you're on. You can find the IP address to use inside Plesk > Websites & Domains > [domain name] > and check at the bottom of the page.
Please let us know if we can help with anything else. 🙂