Bonjour Benoit,
Just out of interest, what is problem ? Possibly it is that there is not much traffic with ADB-S or PilotAware traffic in France, perhaps that will come.
The Zaon PCAS kit is great - i had a unit for about 6 years and found it very useful but when it when it went broken i had no choice but to get PilotAware which is great in the UK.
If you have need of an old PCAS unit for hardware spares just ask. My unit got slightly hot when i put the batteries in the wrong way and never worked again!
Phil