Hohoho guys !
I think I get it !
based on your comments, I tried something else to complete investigations =>
I used the engage instruction ... for the same platform
FF2 (in EMCOM) engage FF2 =>
and immediatly the radar is switched on !
this certainly need some more investigations (is this damn AI going to destroy itself ? lol) but it works !
a mission to test this =>
http://okof4.free.fr/missions/DW/Kill_EMCOM.mu