I bought a second hand Maschine+, when it arrived and I tried registering the serial on NI access, I came across registration error. The previous owner (still in contact) said he hasn't registered the serial because he previously owned a maschine+ so he never registered the one he sold to me, I should be fine with registration. The hardware is working fine and I didn't have to activate it I just turned it on and it been working. I contacted NI support and I'm waiting on a response. Any one know what I can do to get this fixed?