Spectralayers Stems

Can someone shed light on why Spectralayers stems won't play on my Live II. It doesn't matter what wav file format I use (16/ 44, 24/ 48, etc), they will not play. Even if I use a file convertor to make sure that the wav is standard pcm, no joy. Serato stems play fine as do RIP X.

To answer the next question, why don't I just use those?? Spectralayers seperation sounds considerably better - at least for the material that I'm using it on.

Any ideas??

So if you open the Spectralayers stems in Audacity and save it as a wav file in there, it also is not recognized by the MPC?

This happens with Lala.ai. I just open it in melodyne and export as new wave