Need Help badly with gotoandplay and enemy fire

Hi
This is my first post and i am pleading if you can assit me friends, my actionscript file is attached.

I am writing a flash fite game using actionscript 2 and have two problems, 1. if the score = 5, game goes to begin scene which is a test, it does this but the enemy is still on screen when he should be on the game scene, problem two is i am finding it hard to get my enemy to fire back at ship using setInteval and just writing the code, please look at code etc and help me, i am find it hard and have got things working such as ship shots and hittest but just stuck with these two.