[AS2 MX04] How to throw/catch errors in callback functions?

[Sptm]

(How) is it possible to catch an error thrown in a callback function like onConnect of the XMLSocket object?

var s:XMLSocket = new XMLSocket();

// Will not catch error :-(
try {
	s.onConnect = function(succes) {
		trace(succes);
		throw new Error("Unable to connect");
		
		trace("Won't trace, error thrown");
	}
	s.connect("127.0.0.1",1024);
} 
catch(e:Error) {
	trace(e)
}