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