it took me WEEKS and much anguish to figure out why my brand new rox 5.0 (and the seller sent me TWO that i tested)...

was working INTERMITTENTLY...

it was my very expensive $400.00 exposure maxx-D light!

when the light was 'on' -- my rox 5.0 readouts would blank out

when the light was 'off' -- no problems

so do this:

1. make sure all of your sensors are on the SAME SIDE of the rox 5.0
(you need direct line of sight)

2, move your light as far away as possible from the rox

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i STILL have occasional issues because i can't move my light far enough away