ADS-B for Flight Radar... not working-why??

[desvm]

Hi Folks,

I have the following set-up:
Dynon EFIS D100
Dynon EMS D120
Garmin GPS 496
TrueTrack Altrack Autopilot (not yet in use)
Trig TT21 Transponder
Garmin NAVCOM SL30

I have connected the GPS as a source into all of the above.
My Dynon is working perfect with the GPS, getting the signal and works fine.
However, I have tried to set up the Transponder to get ADS-B because I would like to be visible on flightradar24.com.....
But it is not working for some reason.
Anyone who got some advise?
Much appreciated
Cheers :

 

[dynonsupport]

That sounds like a question for Trig. The TT21 needs to be connected directly to the 496, so none of Dynon's equipment is involved in any way.