Using Cubase with Meris MIDI I/O and Hedra pedal

I am trying to use Cubase to set Meris Hedra pedal presets with MIDI program change commands, just by setting it up as up a MIDI device on a channel [3] and changing the “program selector” value, which I believe reflects the program change value sent to the device.

The Hedra pedal needs a Meris MIDI I/O to connect from standard MIDI cable to TRS cable.

When I change “program selector” value, I don’t seem to change between presets, I just get a lot of activity from the LEDs on both the Meris components.

I am wondering if anyone has done this successfully. Any tips?