I am getting re-directs error on Pro-site setup

Hello
i am getting the following error after I manually added the first pro site.

The webpage at http://www.socialsupplychainnetwork.com/dscd/wp-admin/ has resulted in too many redirects. Clearing your cookies for this site or allowing third-party cookies may fix the problem. If not, it is possibly a server configuration issue and not a problem with your computer.

Also, is their a process which I can or should post on the site. I go to Pro and it tells me I have to be logged in first. Can new clients simply or Pro site or do they have to register or something as a process to get started..Also, do they buy the service and then do domain mapping or do we do it for them?

Thank you again.

Louis