[Plugin: Sabre] Is SABRE working or not?

SABRE seems to be keeping out the riff-raff, but it also seems to be keeping out the regular users.

On two sites of mine it doesn’t allow anyone to register as it always says “invalid code”.

http://www.silenthillresorts.com is the main site. If I get that one working the other will as well, as they have pretty much identical installs on the backend.

Anyone able to register there and actually become an active member? This is not a cheap way to get people registering, I seriously think there is something wrong with SABRE or at least my install of it as no one has been able to register at all.