About jetways: does it happen at every parking, or just some, or one ?
About ParkMe: is the ParkMe menu working with all the options, but the docking system doesn't lit up ? Have you selected the correct parking.
Note that, at KJFK the actual numbering might be confusing, because there's an AFCAD designation and a real world designation as a reference. The numbering you see on the buildings correspond to the real world designation but, what you'll heard from the default ATC is instead coming from the AFCAD, with a different numbering so, just be sure you have selected the correct one.