Make sure that “MIDI Channel” under the “Global” tab in Patch Base matches the MIDI Receive Channel on your DX100. To check the MIDI Receive Channel on the DX100, press Function/Compare, then Button 3 (“Channel”) until the screen reads “Midi R Ch=”. Use the data slider to change the value on the DX100.
If you see “Memory Protected” on the DX100 when you try to save a patch to the synth, that means that Memory Protection is turned on.
To turn it off, press the Function/Compare, then Button 12 (“Memory Protect”) . Use the data slider to make the screen read “M.Protect:off”. Please note that this needs to be done each time you turn on the DX100, as it resets Memory Protect to “on” when it is powered on.
When you make a change to the Voice Bank on the DX100, you should see “Midi Received” on the DX100’s screen.