When we first launched CoI, the MMCCIII Campaigns ran with no problems.
I have no idea what has changed since then, though I guess they were moved on to a new Server? It has to be a Windows Computer (does not even *need* to be a Server), and has to have the MS Java VM installed. If they are using the latest Windows Server, there could be a compatibility issue (Windows 7 reports a compatibility issue with the MSJVM, though you can ignore the error message when installing it and it seems to work anyway). Whatever the reason, I believe they are duty bound, if not legally bound, to provide the Service.
We all appreciate that technology can present us with challanges, but the lack of communication from Matrix (Andrew excepted) is appalling. For politeness sake, I refrain from venting my true opinions.....
I have asked Trading Standards for advice and waiting their response.