When producing flash contents with Flash built-in EventDispatcher class, one annoying bug is that, after edited by several different people, with different versions of Flash, even in different Locale settings, the Flash file tends to be unable to dispatch events using EventDispatcher.
To fix this, you have to open a new Flash document, paste everything from your original Flash file, then republish the Flash again - voila, problem solved.
Edit:
After investigation, this seems due to the other teammates had added a loader scene in the beginning of the Flash file, breaking the availability of the main class in that scene, which is required for other flash files to addEventListener. So, always wait for the object to be available before you begin the event initialization will be a good habit.
