Ahh i see. I had one for MegasceneryX and TrafficX.
That would supposed to solve only the misplaced airplanes, not the low number of airplanes.
Took both out however, all i saw was 4 aircraft at 100%. Perhaps next time i reboot i'll get more.
You should first try to check if the airplanes are not there, or they are just invisible. This could be probabably checked with the Traffic Toolbox by MS that comes with the SDK, or with any other traffic board utility.
If they are invisible, it's usually problem of using legacy FS9 models in FSX. However, this problem happened only when the scenery used the FS9 runway lights command. KDFW doesn't use it so, this shouldn't be a problem.
Another issue might be the airplanes radiuses against the parkings radius, it TrafficX uses a somewhat non standard radius, FSX might fail to assign a parking that fits an airplane.
And, you should also check the TrafficX schedule for that time and day of week at KDFW, to see how many are *supposed* to be there.
In any case, we have tested KDFW with Ultimate Traffic 2 in FSX, and with World of AI in FS9, and there's plenty of traffic to be seen, probably more than a hundred airplanes so, this should eliminate any problem specific with KDFW.