I think I know why mine are being marked Invalid, it could be because I have Client 7.0.11 Installed on all my Box's now. So I've screwed myself unless I go back to 6.12.34 or something like that. In order to go back I'll lose a Ton of Wu's in progress, so the moral is sometimes it's best to just leave things alone in BOINC instead of trying to do better in a Challenge, I don't have the time or the motivation to go back in Clients right now, it's all just too frustrating some times ...