Where is my trouble?

These the logs of shell:
[2011-06-21] [SocketServer] NEW CLIENT Resource id #7 [IP: 127.0.0.1]
POLICY FILE REQUEST
[2011-06-21] [SocketServer] REMOVING CLIENT Resource id #7

Why removes the client?

print “Starting Socket Server…\n”;

$host = “localhost”;
$port = “8080″;
$max_users = 10;
error_reporting(E_ALL);
set_time_limit(0);
ob_implicit_flush();
$sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
if (!socket_set_option($sock, SOL_SOCKET, SO_REUSEADDR, 1)) {
echo ‘Unable to set option on socket: ‘. socket_strerror(socket_last_error());
} else {
echo “Set options on socket.\n”;
}
socket_bind($sock, $host, $port);
socket_listen($sock, $max_users);
$childSocket = socket_accept($sock);
$incomingData = socket_read($childSocket, 2048);
print “—-”.substr($incomingData, 0, -2);
if (substr($incomingData, 0, -2) == “respo”) {
$response = “Server Response > I am here!\n”;
print “11111\n”;
socket_write($childSocket, $response, strlen($response));
}else{
print “22222\n”;
}

and here is my as3 code:

<![CDATA[
private var server:String = "localhost";
private var port:Number = 8080;
private var socket:Socket;
private function init():void {
socket = new Socket();

socket.addEventListener(Event.CONNECT, onConnect);
socket.addEventListener(Event.CLOSE, onClose);
socket.addEventListener(ErrorEvent.ERROR, onError);
socket.addEventListener(IOErrorEvent.IO_ERROR, onIOError);
socket.addEventListener(ProgressEvent.SOCKET_DATA, onResponse);
//Security.allowDomain("*");
//Security.loadPolicyFile("http://"+server+"/crossdomain.xml");
try {
socket.connect(server, port);
outMessage("Trying to connect to "+server+":"+port);
} catch (error:Error) {
outMessage("3333333333333333333333");
socket.close();
outMessage(error.message);
}

}
public function send(string:String):void {
socket.writeUTFBytes(string);
socket.flush();
}
private function onConnect(event:Event):void {
outMessage("Connected to "+server+":"+port);
send("respond");
}
private function onClose(event:Event):void {
outMessage("Connection closed");
}
private function onError(event:IOErrorEvent):void {
outMessage("Connection error");
}
private function onIOError(event:IOErrorEvent):void {
outMessage("I/O error");
}
private function onResponse(event:ProgressEvent):void {
outMessage("onResponse");
var string:String = socket.readUTFBytes(socket.bytesAvailable);
outMessage(string);
}
public function outMessage(msg:String):void {
log.htmlText += ''+msg+'';
}
public function send_message(event:MouseEvent):void{
send(txt_input.text);
}
]]>

first time connect to socket server is ok. but the socket is close auto after the first time i call socket_write($childSocket, $response, strlen($response));
it take me alot of time to debug but still is a secret.
please help me!

this part of comment is to ranking on google in my language(you can edit).

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