Bluesound sub + connection problems to Cyrus 40 ST streamer

Hi, I can see the sub+ in the players draw along with the Cyrus.

I can't seem to wireless connect the sub.- I have been told this is not possible?

If I connect via the analogue out , the sub indicator goes blue not flashing. 

Might be a dumb question, but do I just expect that the sub only works this way and does that mean I can still use the core features of the sub i.e. crossover, etc