Login form showing instead of Pricing Tables

Hi I'm trying to create a network similar to edublogs with Pro Sites.
I've configured the plugin and the first time I go to the Pro Site page I can see the pricing tables with the different levesl I've set up.

I can create a free website and everything works fine. However, if I log out form the site I've just created and I visit again the main site of my network, instead of seeing again the pricing tables with the different levesl I've set up, all I see is a login form with the following message "You must first login before you can choose a site to upgrade".

I've checked the option "Both sites and user accounts can be registered." on my prosites plugin settings, but I try to create a new site I get the "You must first login before you can choose a site to upgrade" message

The site I mean is http://salutora.com/pro-site/.