Alesis Nitro connecting to Groove Agent

Hi Can someone help please?
I am trying to connect an Alesis Nitro to Groove Agent.
Here is the process: Run GA stand alone. Click on the Use Hardware Controller Mapping Button. Right click a drum pad select assign trigger note for all the pads I need.
Saved the map.
Nothing happens when I hit any drum pad. Midi input light very top left glows on strike but nothing else.
What am I doing wrong?

Had similar question- connected with a USB cable, set the midi input channel to 10 and away you go.