I’m frustrated

Issues connecting multiple midisports

I'm Having trouble using a midi sport 2x2 anniversary edition and a 4x4 anniversary edition simultaneously. Im on win 7 64bit using ableton 9 64bit.

Both devices are recognised by my computer/ableton but none are selectable using an 'external instrument'. The 2x2 used to work fine on its own, but now neither work and both lights on the units are kind of blinking which I'm pretty sure didn't happen before.
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