8KX does not track base stations

Not sure what’s going on- neither pitools nor steam is picking up my 2.0 base stations. Both of which have green lights and appear to be working.
I’ve tried rolling back the dfu firmware and various pitools, no joy.
The headset works with 9 axis tracking in that I at least get the Pimax moonscape, but when I try to launch a game IL2 Stalingrad, Steam VR freezes and refuses to continue. Hmmm.
Any ideas?
thanks all