Maybe because Flash was very important in ancien rome. You have to know that roman, at that time, where not very good in actionscripting, they were using xml and c sharp to create robot to do actionscript, but them, one day came Flash man, a young and restless super hero. He made a super actionscript bomb and detonated it in rome. Every particle of AS knowledge was distributed to people, giving the opportunity to build test scene action and test movie action....
Anyway, the reason, why your ccode does'nt work in test movie, it's maybe beacause you have instance problem. 2 instance of same mc that have the same instance name cause flash to ****. And he **** good. He just does'nt have tits, but that's another story.