We've recently changed our broadband to BT. The beam is working fine but no sounds from SL1 surrounds..they all say connected..I've tried factory resetting and rebooting the router. In the system info it says surrounds won't work with the WiFi? But when I take them off as surrounds and added just as speakers they work fine with the WiFi. Can anyone shed any light ?

Moderator edit: redacted serial numbers from picture