If I understand you well, you wish to use pads 9-16 to trigger drum, as pads 1-8 do.
In its default configuration, pads 9-16 are programmed to perform control duties, this is not compatible with what you want.
You have to:
- use MIDI Control Center to create a custom configuration where pads 9-16 send MIDI notes
- download this configuration to let's say memory #3
- recall this memory (shift + Pad 3) anytime you wish to used pads 9-16 for drum
The Midi configuration should be as follow:
- pad 9: Mode MIDI Note / Gate, channel 10, CC number 44
- pad 10: Mode MIDI Note / Gate, channel 10, CC number 45
- ...