No Luck just did that am using Ultimate Traffic 2 latest version
If the Airport scanner hasn't found any conflicts, it doesn't mean there aren't any, it only means the scenery causing the conflict is not an AFCAD, so it can be any random .BGL you might have installed and long forgotten. In this case, it would be more difficult to find. The only thing sure, it's another scenery in conflict.
This, of course, assuming you keep KLAX at the top of the Scenery Library, which is were the installer puts it as default. If you have moved the layer manually, you need to be sure it stays on top of something that might clash with it.