If your domain name does not appear in the Instantsite drop down box for you to select, this means that you have already purchased a hosting package for the domain name in question.
Hosting packages and the instantsite tool are not compatible, this is why you cannot access the instantsite tool for the desired domain name.
If you wish to have the hosting package deleted to enable you to use the instantsite tool for this domain name, please contact our support team using the Ask a Question tab at the top of this page.
Please note: If the hosting package is deleted, all mailboxes supplied as part of the hosting package will also be deleted.