Hello, This is probably a simple thing, but the other day I had to unplug the transmitter and when I plugged it back in, it lost connection with the pair of Beolab 18s and they would not reconnect. I followed the instruction and tried many times but no luck. Is there anything I can try to reconnect them? Do I need to update the firmware? They have been working fine for a long time, so it feels like it's a simple fix. Thanks for your help in advance.