Hmm, it seems the domain is not synched correctly across our DNS servers. On one of them, it returns the correct IP address, but on the other it points to the domain parking service we use for unused domains.
This can usually be fixed by removing the domain from the account and then adding it again.
You can remove the domain through the Addon Domains section and then add it again through the Subdomains section.
EDIT: This might not be an issue specific to your domain. Will investigate.