Site is down. Says I'm not registered

I have a site for my photography business. I have a main site http://www.susielinquist.com and a 2nd site, but essentially the same site/business. The 2nd one is not working all of a sudden. It’s saying it’s not registered. When I try to register it, it says it’s not the right code. http://www.susielinquist.com/boudoir

Any ideas?