I've just bought a SB Duet and an additional receiver. Controller and bedroom receiver connect to the network with no trouble and streaming music is fine. Lounge receiver, once turned on, keeps flashing it's red light. I have performed a full reset on it, I have tried it in different locations, including the bedroom, I have also tried connecting it to the ethernet cable, yet it still keeps flashing (for over an hour last night). Does anyone have any suggestions?