What is the firmware loaded on the P4 (hold the x1 and x2 buttons down at the same time), my P1 is 01.14.03
Hmm, those lines are to do with Redrum Drum Computer, that mapping has not been touched in years.....
So steps to take:
Double check firmware version and update if needed.
Run both of the Nektar setup programs.
reinstall the mapping from the dropbox after the setup programs are completed.