1131:Packages must not be nested

Hai all,

I m working on a Flex Application, in which I have to communicate with the server through TCP Socket. I am using XMLSocketClass. I got a code from help, but I am getting "1131:Packages must not be nested" error whenever I m trying to compile it. Pls tell me the reason for this error.

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XMLSocketExample.as
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package //ERROR// 1131:Packages must not be Nested
{
import flash.display.Sprite;
import flash.events.*;
import flash.net.XMLSocket;

public class XMLSocketExample extends Sprite {
private var hostName:String = "localhost";
private var port:uint = 8080;
private var socket:XMLSocket;

public function XMLSocketExample() {
socket = new XMLSocket();
configureListeners(socket);
socket.connect(hostName, port);
}
public function send(data:Object):void {

socket.send(data);
}
private function configureListeners(dispatcher:IEventDispatcher):void {
dispatcher.addEventListener(Event.CLOSE, closeHandler);
dispatcher.addEventListener(Event.CONNECT, connectHandler);
dispatcher.addEventListener(DataEvent.DATA, dataHandler);
dispatcher.addEventListener(IOErrorEvent.IO_ERROR, ioErrorHandler);
dispatcher.addEventListener(ProgressEvent.PROGRESS, progressHandler);
dispatcher.addEventListener(SecurityErrorEvent.SECURITY_ERROR, securityErrorHandler);
}

private function closeHandler(event:Event):void {
trace("closeHandler: " + event);
}

private function connectHandler(event:Event):void {
trace("connectHandler: " + event);
}

private function dataHandler(event:DataEvent):void {
trace("dataHandler: " + event);
}

private function ioErrorHandler(event:IOErrorEvent):void {
trace("ioErrorHandler: " + event);
}

private function progressHandler(event:ProgressEvent):void {
trace("progressHandler loaded:" + event.bytesLoaded + " total: " + event.bytesTotal);
}

private function securityErrorHandler(event:SecurityErrorEvent):void {
trace("securityErrorHandler: " + event);
}
}
}
============================================================================
Flex File
============================================================================
<?xml version="1.0" encoding="utf-8"?>

<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute">

<mx:Script source="XMLSocketExample.as"/>

<mx:Button x="202" y="140" label="Button" id="sendButton" name="sendButton" />
<mx:Label x="204" y="110" id="conn_txt" enabled="true"/>

</mx:Application>