[Flash 8] Need Help - Managing Movie Clips

It was my understanding that the onLoad event occurred when a Movie Clip was loaded
or **[COLOR=red]appeared [/COLOR]**in the timeline. Attached is a small fla that I have been using to test this
out but it doesn’t work. Shouldn’t onLoad event occur in frame 10 when the box2_mc enters the time line, And then shouldn’t the onEnterFrame event occur for each frame of the box2_mc. It doesn’t. What am I missing!!! Your help would be appreciated.