Hi all,
If you run P3DV4 under W10, be sure to install and run the VAinterface "AS AN ADMIN", be sure to have admin rights on de VAInterface folder.
Also add an exclusion for the VAInterface.exe to your antivirus (that was one of my problems, couldn't connect with no error message) Doing all that
solved my problems. Hope it could help.
Cheers.
NB :I run P3D BEFORE running VAInterface