Add on board not triggering open/close sensors

I just installed an add on board, it connects to the wifi, registers the two open/close sensors in SmartThings, but when I open/close, they don't trigger.  I've verified the wiring to the two sensors is working by moving them to the main board.  I've tried removing and re-adding the add on board, ensuring the firmware is up-to-date, rebooted all equipment in the home, still nothing is working.  Anyone experience this or have something I should try?

Sounds like you have some end of line resisters installed. They need to be removed I believe.

No resisters installed.  Main board works fine, even attached a sensor I'm trying to add to the add on board to the main board and it works on the main board, just not add on.