Sorry all... totally my mistake this time...
Indeed the problem seemed similar to the one the site had a few months back. I couldn't do anything about it then, since it was a technical problem Dotster suffered from.
However... I'm to blame this time. I forgot to renew my account, which expired on 11 March. I received an email from Vintersorg, stating the site did not work... I wasn't aware of it, I'm really sorry.