Site Down Need Help ASAP!!!!!

Installed Pro Sites plugin, by uploading it to the site, and then network activating it. As soon as we did, all of our sites went down. We then disabled the plugin, but the sites are still down. I see where there is tables created, but what would cause these sites to not come up, even when the plugin is disabled???? Please let us know ASAP , It says server not found, I attached screenshot