ActionScript 3.0 :: Alling A Function From An Imported .as File In An External Swf?

I've got a main.fla which has a main.as file included within various functions in the fla. Then I have external.swf being called in, which have external.as files that need to call on a function within the main.as file.Ultimately, the "next" button is supposed to be unclickable until the external swf has completed, then it glows and lets you click then turns off again. Problem is, as it stands the "next" button never turns on because function's not being properly called.Here's the code, trimmed down to the essentials.know what I'm doing wrong here.main.fla

Code:
function external1(e:MouseEvent) {
gotoAndStop("external1");

[code]...