Sending bytes in flash target problem

Help
#1

hi,
so I made socket connection, as always all is working in neko, but in flash when i try to send bytes:

var msg = {action:"new_game", type:"multiplayer"};
    this._socket.writeBytes(cast MsgPack.encode(msg));
    this._socket.flush();

it do nothing in flash.
i try to put trace before and after this lines, and line after writeBytes never executed.
also server never get the message.
so how to send bytes in flash?

#2

Could you check what MsgPack.encode is returning to you? Is it null? If not, what is the .length? Does it help to set .position = 0; on the return value?

If MsgPack.encode returns haxe.io.Bytes instead of openfl.utils.ByteArray, you may need to do ByteArray.fromBytes () on the return value