var blockSize:int = 4096;
                    var startPoint:int = 0;
                    var length:int = ba.length;
                    var sendDatalength:int;
                    var block:ByteArray;
                    var blockCount:uint = 0;



                       // debug

                       var debugBA:ByteArray = new ByteArray;

                       // end debug

                    while (startPoint < length)
                    {
                        sendDatalength = blockSize;

                        if (startPoint + sendDatalength > length)
                        {
                            sendDatalength = length - startPoint;
                        }

                        block = new ByteArray;

                        block.writeByte(1);
                        block.writeByte(2);
                        block.writeByte(3);
                        block.writeByte(4);
                        block.writeByte(5);
                        block.writeByte(6);
                        block.writeByte(7);
                        block.writeByte(8);
                        block.writeByte(9);
                        block.writeByte(10);

                        block.writeUnsignedInt(blockCount);

                        block.writeBytes(ba, startPoint, sendDatalength);

                        // debug

                        debugBA.writeBytes(block)

                        // end debug

                        clientSocket.writeBytes(block);

                        clientSocket.flush();

                        startPoint += sendDatalength;

                        blockCount++;
                    }

                                //// start debug

                        var path:String = "D:\\tempBase64\\" + "test" + ".bytearray";
                       var ff:File = new File(path);

                       var fs:FileStream = new FileStream();

                       fs.open(ff, FileMode.WRITE);
                       fs.writeBytes(debugBA, 0, debugBA.length);
                       fs.close();

                    //// end debug



                }