Dear Ahaus,
Our data center provider is currently experiencing a wave of DDoS attacks. They are working around the clock to solve this issue as I write, but during the next few days it is expected that servers will ocasionally go down and up intermitently for a few minutes. We will update this thread accordingly as soon as we have more news on the matter.
We are very sorry for the inconveniences this may cause and hope that the situation improves as soon as possible.
Your Tentlan Team