Assuming that the DAWs are sending MIDI to the EW425...
The PSR-EW425 follows the Yamaha XGlite voice architecture which is a super-set of General MIDI. At the very least, GM channel 10 is the drum part.
If you finger-drummed into some other part, needs to be set to the desired drum voice. Rock Kit is Bank Select MSB 127, Bank Select LSB 0, Program Change 1. Depending on your DAWs convention, you may need to subtract one from the Yamaha Program Change number.
If the finger-drum is not channel 10, you may also need to send an XG drum set-up SysEx message to the desired MIDI channel.
Hopefully, your DAW(s) have instrument definitions for the PSR-EW425 (or something like it). It's much easier to change voices by name than MSB/LSB/PC.
Hope this helps -- pj