AMF connection working on browser, not in stand alone player

Here's my code, in case its needed (it's a pretty straightforward hello world example):

PHP SIDE: $a = new Amf_Model_Test();     $server = new Zend_Amf_Server();     $server->setClass('Amf_Model_Test');     echo $server->handle();

class Amf_Model_Test {   /**    * return string                   */   public function greet()     {         return "hello";     } }

AS SIDE: public class main extends Sprite   {     private var _resp: Responder;     private var _nc: NetConnection;     private var tf: TextField;     private var _gateway: String;     public function main()     {                 tf = new TextField();       tf.width = 500;       tf.border = true;       tf.borderColor = 0x0000FF;       addChild(tf);       _gateway = 'http://cms.loc/amf';       _resp = new Responder(onResult, onFault);       _nc = new NetConnection();       _nc.connect(_gateway);             _nc.client = this;       _nc.addEventListener(NetStatusEvent.NET_STATUS, onNetStatus);             _nc.call("Amf_Model_Test.greet", _resp);           }     private function onNetStatus(event: NetStatusEvent): void     {           trace(event.info['code']);           tf.text = "Status = "+event.info['code']; }     private function onFault(result: Object): void     {       tf.text = "Fault = " + String(result);     }     private function onResult(result: Object): void {       tf.text = "Result = " + String(result);     }   } }

In my browser, I get "Result = hello", as expected. In the stand alone player (which is exactly the same version) I get "Status = NetConnection.Call.BadVersion".