This RemotingConnection class extends NetConnection and sets the objectEncoding to AMF:

package
{
import flash.net.NetConnection;
import flash.net.ObjectEncoding;
public class RemotingConnection extends NetConnection
{
public function RemotingConnection( sURL:String )
{
objectEncoding = ObjectEncoding.AMF0;
if (sURL) connect( sURL );
}
}
}


This class employs the above class, and makes a remote service call:


package
{
import flash.net.Responder;
public class AS3RemotingTest
{
public var dataProvider:Array;
public var gateway : RemotingConnection;
public function AS3RemotingTest()
{
this.init();
}
public function init()
{
var gatewayUrl:String = "http://localhost:88/amfphp/gateway.php";
gateway = new RemotingConnection(gatewayUrl);
var responder:Responder = new Responder(onResult, onFault);
var arg:String = 'foo';
gateway.call( "HelloWorld.say", responder, arg);
}
public function onResult( result ) : void
{
trace('onResult invoked');
trace(result);
}
public function onFault( fault : String ) : void
{
trace('onFault invoked');
trace( fault );
}
}
}

(Note: The above code assumes that you have AMFPHP installed and running out of a folder named amfphp on your localhost)