New Behringer Swing - Some keys not working?

New

When playing it within my DAW software, the first 6 keys make no sound - If I drop it down an octave, the first 2 or 3 keys then make a sound, but all the rest of the keys don't, until you get upto the very last few keys. If I raise it an octave, I get sound from all of the keys - Can anyone tell me if I need to 'set it up' first, or is it faulty?


Many thanks.