[ Blue Burst ] Connection problems - No 903?

[Forge]

I downloaded Blue Burst the other day, but when I try to start the game or download a patch, I get the same message telling me that the Patch Connection failed. I have attached an image of the message below.

Is it just that there is maintenance (which I can't see mentioned on the original site) or is there something else I must do? I've already excluded the Blue Burst folder from my firewall settings, just in case it was that.

Thanks in advance.