ActionScript :: ExternalInterface - Cannot Access MovieClips From Callback

Basically, I have some functions in my as file. Some of them play with a mc instance. The instance is not available when calling the function that uses it as callback.

AS
function B(){
ExternalInterface.call('console.log','ok')//OK!!!
} //italy is a MovieClip on the Main timeline
function A(){ B();
ExternalInterface.call('console.log',italy)//Error!
} ExternalInterface.addCallback('test',A);

JS
$('flash').test();//flash is my html swf object

The error I get trying to reference italy from A (only) whem called from javascript:
Uncaught exception: Error in Actionscript.
Basically, the italy movieclip is available through the AS functions. But it isn't available if I call an AS function from javascript. As you can see though, I see B from A. It's only Italy that I can't see. why?