Actionscript config constants in source

I have projects that use config constants to provide configuration based variations.  But every place I use them shows as an error.

The error is "Unresolved variable or type CONFIG" no matter how I use it. For example:

CONFIG::air

private var _orientation : int;

or:

private function setup() : void

{

addEventListener(MouseEvent.MOUSE_MOVE, moved);

if (CONFIG::air)

{

// respond the initial touch on a tablet

addEventListener(MouseEvent.MOUSE_DOWN, moved);

}

}

In all cases "CONFIG" is highlighted in red and the rest ("::air") is black.

Does anybody know a way to resolve the error?