Show Cue System

Hello,
I'm trying in vain to establish an artnet connection with my Showtec NET-2/3. Unfortunately, no data is being sent to the interface. The blue control LED remains off. The ArtNetView on a second PC doesn't show anything either. But the interface works without problems in another program.
Has anyone tried this?

Does it need a driver of some sort?

I was caught out earlier this year forgetting to install one, but that might have been to my Enttec USB device, can't actually remeber now.

FYI Artnetmonitor appears to be a passive network listening program it does not seem to have any active Artnet poll responses so it you use it in stand alone mode there will be no Artnet traffic. The Artnetominator is a better free program that will simulate an Artnet device and show you traffic.
https://www.lightjams.com/artnetominator/