Passing variable from one fla to another


I have integrated a swf into another swf.
(Actually it is a menu that I have incorporated in my ‘main swf’.)
When clicking a button in swf no.1 (the menu) I set:

_global.new_value=“1” ;

-and then in swf no.2:

function newfunction(){



I get nothing, just: “undefined”.

How do I pass a variable ?
Do I have to use asp or the like ?

best regards