BOAC,
Many thanks for your suggestions. I have now re-changed back to the old address, received the admin email, rechanged back to the new address and all now works well.
PPRuNe admin didn't cover themselves with glory as after my first reply which told me everything was working (not the message you got) they ignored my next 3 e-mails!
Anyway, alls well now, thanks again.
BusyB