Ok, just did a Live Update, and tried it with the Aerosoft A321 Pro at LGAV (FlyTampa) with GSX jetways.
It worked!! for the first time in more than a week.
Yesterday, I was flying the FSLabs, also at a GSX-enabled airport (that's to say, it has an .ini file in the AppData\Roaming\Virtuali\GSX directory), and it didn't work.
Yes, GSX Level 2 is activated, as you can see
Thanks
Chris