Flash :: NetStream Status Events Not Work?

I have a bunch of potential random strings for recvStream.play("randomstring");then i have a timer checking every 5 seconds on a function that runs an event listener:

recvStream.addEventListener(NetStatusEvent.NET_STATUS,
netConnectionHandler);

then im thinking in a switch statement i can use it to check if it's an active stream or not to either have it search for another stream that should be active or stop the timer and let it play.

// i was thinking this would verify it's playing and then that's it
case "NetStream.Play.Start" :
trace("ITS PLAYING YOU SHOULD SEE SOMETHING");[code].....

//I also tried NetStream.Play.StreamNotFound instead of NetStream.Buffer.Empty didn't work either.But it really doesn't work like that. Is there something else I should be using instead of NetStream.Buffer.Empty ? Or something else all together? I'm using Actionscript 3 in Flash CS5 and I'm using Cirrus RTMFP