Multisite in subdomain

You can use Multisite in a subdomain. You can also make sub-subdomains (i.e. site.beansoup.rentawebstore.net) but that depends if you made your server right.

What subdomain? http://beansoup.rentawebstore.net/? There’s nothing installed there.

WHERE is WP Installed 🙂 Pre Multisite, what was the URL.

Okay. So Multisite is NOT in a subdomain, Multisite is in root. You want to have a subsite as subdomain.domain.com. (Terminology matters)

What have you done to create a new site? If the answer is ‘nothing’ then you start here: http://codex.wordpress.org/Create_A_Network#Step_5:_Network_Admin_Settings

Go to the network admin and create a site 🙂