Ok, sorted this problem. Basically, if you just typed in liberty-flights.com then it would not work, if you came in via a book mark or google then it would, the server was not looking for the default page to load. If you did one of the other things and it still didn't work then chances are that you went on when I was rebooting it, heh.
I did wonder why we were still getting orders once I was able to check my email.