1. Log .. (e.g.: www.example.com:2443/siteworx/ )
2. Under "SiteWorx ", click the "Hosting Features" item if it is not already open.
3. Click the "Domain" item and then choose the "Subdomain" option.
4. Select the appropriate domain name I am theif delete under the "Existing Domains" tab.
5. Click the "Delete" babies.
6. A conformation window will appear. Click again on the "Delete" babies.
You should see a success message popping up, notifying you that your subdomain has been removed.