The below is based upon my assumption that you did the One-Click install:
Drupal is an Easy install, meaning that it creates the domain when you create the install. When you delete the Drupal Easy install, you delete the domain.
You'll have to go to the panel under Manage Domains and create a new Fully Hosted domain.
If this was a manual Drupal install, check for the existence of a .htaccess file in your domain folder. Your site just isn't loading for me.