Game Doesn't Work!

As was written in my previous post, my Game didn't work. There were two compiler errors:


TypeError: Error #1009: Cannot access a property or method of a null object reference.

at PlaneGame/movelevel()

TypeError: Error #1009: Cannot access a property or method of a null object reference.

at PlaneGame/movelevel()

From just looking at these two errors, I have discerned that the cause of the problem is the "null object reference", which I assume means the the Actionscript file is calling objects that were not even instantiated yet or added to the Display list- one or the other.

Well, looking back at the code, I can see that the main variables in the game- na aircraft and na stage- have already been instantiated, and therefore the problem must be that the objects were not added to the display list before they were worked on. So that's my answer.