yes, the issue was this :
enable "Online" in LNM menu "Scenery Library" -> "Airspace Libaries".
somehow I remembered that the shape of the selected online controllers will be likein WebEye and more observable.
Ok, thank you Alex.
Hi Alex,
Setup to connect to IVAO, the "select centers and other spaces" is ticked to "all" , though it's grayed out. (Online flying it on).
There is an active tower in IVAO, but it doesn't appear on the map.
Thanks,
Doron.