RTCDataChannel send method not sending data

I'm having a strange problem with RTCDataChannel.

I'm doing some research on WebRTC and I have working WebRTC audio/video chat already. Now I wanted to add text chat and file sharing to it using RTCDataChannel.

I've created RTCDataChannel like this:

var dataChannelOptions = {
    reliable: true,
    maxRetransmitTime: "2000"
};

dataChannel = yourConnection.createDataChannel("testDataChannel", dataChannelOptions);

dataChannel.onerror = function (error) {
    console.log("dataChannel.OnError:", error);
};

dataChannel.onmessage = function (event) {
    console.log("dataChannel.OnMessage:", event);
};

dataChannel.onopen = function (event) {
    console.log("dataChannel.OnOpen", event);
    dataChannel.send("Hello World!");
};

dataChannel.onclose = function (event) {
    console.log("dataChannel.OnClose", event);
};

And only thing that I receieve on both sides is log from first line of dataChannel.onopen. I don't receive log from dataChannel.onmessage.

No errors..

When I manually call dataChannel.send result is the same.

Tested on:
Google Chrome (50.0.2661.94)
Firefox (45.0.2)

Anyone can help with that?

this is a common mistake people make, you are creating datachannel on both browsers, but not accepting on either, you need use the RTCPeerConnection's ondatachannel event and set the listeners