how to target scenes from external actionscript file (.as)

[Max58kl]

I have a flash file containing 9 scenes.
I thought that it would be a good idea to place all
code in an actionscript (.as) file.
//include "main_as.as ";

On one scene I have an array of buttons

var myArray:Array = [btn1, btn2, btn3, btn4, btn5, btn6, btn7, btn8];

This works fine as is.

If I add two more buttons to a second scene
btn9, btn10 and add them to my .as file

var myArray:Array = [btn1, btn2, btn3, btn4, btn5, btn6, btn7, btn8, btn9, btn10];

The animations work on the buttons in the first scene, but not the second.

If I try to include the .as file in the second scene also

//include "main_as.as ";

I receive lots of duplicate function errors.