I don’t understand what exactly is not working, can you be more specific?
I looked at your patch and I see nothing wrong. I loaded samples into the samplers and used the input module instead of MIDI modules to quickly check that the signal path is OK.
Your MIDI modules are configured for CH1, I’m assuming you are sending all your CC messages on channel 1? What do the CC outputs of the MIDI modules show when you move the CC sliders/knobs on your MIDI Controller? can you see the output signal changing on the MIDI modules?
If you see the output signal changing on the MIDI modules do you also see the signals coming into the BUS modules and being sent out of the BUS modules, and do the signals arrive at the AMP inputs of your sampler modules?
Finally, for the sampler playing your mono samples, did you load each mono sample into a different slot inside that sampler module?