Also, I have the same issue, I check with the provider and they said not issues of blocking by them. its X Plane server issue. contacted the help desk of xplane and no positive reply from them. they just blame is that the problem is at my side, actually, it is in their side. their customer support is very bad. it's really a waste of money and time. I suggest going with MSFX not to xplane as they don't give proper support for our problems.