addEventListener never executes

I´ve a Init-class that calls a Connection-class wich set up a connection to a streaming server. When recieving “NetConnection.Connect.Success” it calls a Stream-class that creates a stream over the active connection. The problem is that the event listener for the NetStream never seems to execute. Why?

public function Stream(_connection:NetConnection):void
    stream = new NetStream(_connection);
    stream.addEventListener(NetStatusEvent.NET_STATUS, eventHandler);

private function eventHandler(event:NetStatusEvent):void
     trace("Event: ";

I traced the result and it seems fine (to me).
stream: [object NetStream]
_connection: [object NetConnection]