Hi Umberto,
In addition, I am going to all my airports installed and I am experiencing the same problem at Aerosoft/simwings CDG, Heathrow, Budapest. Fly Tampa TNCM, Aerosoft Tahiti X are fine and so are KJFK and KORD. I must have done something wrong when installing WOAI. I am downloading My Traffic X 5.2 to see if it will work.
I used bglfpfsxconvert to change the flightplans from FS9 to FSX and they are all in my Scenery/World/Scenery folder. At KJFK I can see just about all of my AI packages in action since alot of airlines are represented there so not sure why the other airports aren't working.
Thanks,
David