flex 4 on linux, eseguire javascript

[menphisx]

Capito ma a me in realtà interessava solo far funzionare il javascript, che non va
Eppure ExternalInterface è attivo...

<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" creationComplete="start();">
    
	<mx:Script>
	    
		<![CDATA[
			import flash.net.*;
			import flash.external.ExternalInterface;
			import mx.controls.Alert;
		     
			
				public function start():void {

					if(ExternalInterface.available){

					        Alert.show('ExternalInterface available');
					        ExternalInterface.call("alert('This is javascript called by flex on linux')");

					} else {

						Alert.show('ExternalInterface is not available');

					}


				}

		]]>

	</mx:Script>

	<mx:Button id="button1" click="start()" label="START!" />

</mx:Application>