Problems with s50 pro+

Hi,
Recently bought a S50 pro+ to add to my 4stream devices, problem is it won’t work with my power dynamics WiFi speakers.
My mistake thinking Linkplay devices from different manufacturers would work together. From reading on here it maybe a firmware issue, being the S50 is on 4.6 versions and the
Power dynamics on older 4.2.
Support say arylic only works with arylic.

Anyone got a fix for me?