Are you sure the jetway are not just SLOW to appear ?
As I've said in other posts, the first startup will be slow, like 30-40 seconds, or even more if you have lots of sceneries and, during this time, you can't call GSX and you won't see jetways.
Also, if you try to open the menu before it's ready, it's possible it might get stuck. In fact, it's when you'll see jetways ( assuming you are on an airport that has GSX jetways ), that you know it has loaded.