Update

Currently our website is down, the host disactivated it complely.
It seems that there were too many requests that were still killing the server. I have no idea what is causing that. It is possible that it was a DoS attack, in which case we will have to do some IP filtering in the firewall.
Right now, we'll be using Learner's server to host our website, and later on we'll move it on the new dedicated server when it's done.
If everything goes well, our site should be up and running again by tonight.