I had this same problem....so I got rid of Traffic 360. My sim seems to work much better without it.
found a fix that program sucks went and bought unlimited traffic 2 works better anyways no problems that works.
Have UT2. Tried Traffic 360-everything bad! Aircraft thru walls, no wheels, no gates etc...No good support or promised "fix"!? IMHO a lot of "balls" to release such a buggy new series from such a seasoned developer. Shame!
Hard to improve on UT2 perfection-lol!