I don't have a PC88mx, but to my opinion there are only two possibilities;
1. The banksetting in Cakewalk on channel 10
(drums) refers to the capitol tones instead of the drumsets. (doubleclick bank to cheque) 2. The drumchannel of the PC88mx is set on channel 16.
Keyboards/Sound Units: Kurzweil 2600S, Roland VR-760, Acces Virus C, Roland G-800, Akai AX60, Minimoog, Machine Drum, Roland R8-M, mediastation x-76