MyTraffic2010 is the only program (as far as I could check) that shows that problem. This is while the program does not recognize Ramps GA, but Gates.
It's possible all the airliners are flagged with atc_parking_types = GATE, not allowing the type RAMP ?
In this case, it might be better if you edit their aircraft.cfg to either add RAMP, like this:
atc_parking_types = GATE,RAMP (this means GATE will be preferred, but RAMP is still allowed)
Or remove the whole line entirely, so the parking will be decided according to radius and airline code. It's best to fix it this way, so you don't have to fix every parking at every airport.
The reason why we flagged most of the parkings as GA Ramp, is to stop default FSX vehicles to appear, which are not so nice and kill fps.
I removed your attachement, first because I can't test it since I don't have My Traffic (as I've said, there are no problems with both FSX default traffic and UT2), and because the side effect of getting the default vehicles is not something I would like anyone downloading from this post would get.