3 block erupter blades -> no shares

[Cobega]

hello,

today my 3thr block eruptor blade arrives.
I plugged it into my rig, connecting the cables, setting it up, restarting the whole rig and now no blade get's any shares.
I checked raspberry pi, seems like no one of the 3 asks for work.
Any body an idea, where's the problem?

Kind regards;

[Cobega]

--fixxes doing some restart works again and again now its fine.