API Platform|STOMP CONNECTION using Websocket

<P>Hi,</P><P>I need to establish the STOMP connection using Web Socket, I checked the documentation&nbsp;<A target="_blank" href="https://developer.att.com/static-assets/documents/apis/in-app-messaging.pdf" rel="nofollow noopener noreferrer">https://developer.att.com/static-assets/documents/apis/in-app-messaging.pdf</A></P><P>and when I try to connect with the ATT server the event OnOpen not fires. Here an example:</P><P>&nbsp;</P><P>class Program<BR />{<BR />static void Main(string[] args)<BR />{<BR />var client = new XSocketClient("wss://encprodsockjs.att.net/stomp/websocket", "*");</P><P>client.OnOpen += (sender, eventArgs) =&gt; Console.WriteLine("OPEN");<BR />client.Bind("foo", message =&gt; Console.WriteLine(message.data));<BR />client.Open();</P><P>//Send a message for every key press... Until Escape<BR />ConsoleKeyInfo cki;<BR />Console.WriteLine("Press the Escape (Esc) key to quit and any other key to send a message: \n");<BR />do<BR />{<BR />cki = Console.ReadKey();<BR />if (cki.Key != ConsoleKey.Escape) {<BR />//Send a message<BR />client.Send("Hello this is the c# client!!", "foo");<BR />}<BR />} while (cki.Key != ConsoleKey.Escape);<BR />}<BR />}</P><P>But If I replace the ATT server by my local server &nbsp;"<SPAN>ws://127.0.0.1:4502/Generic" &nbsp;the event fires.</SPAN></P><P><SPAN>&nbsp;</SPAN></P><P><SPAN>An the other hand, also I try to setup connection using the login and passcode in order to use the Send method but the event not fire:</SPAN></P><P><SPAN>&nbsp;</SPAN></P><P>string username = "*************************";<BR />string password = "*************************";</P><P>StringBuilder RequestConnection = new StringBuilder();<BR />RequestConnection.Append("CONNECT");<BR />RequestConnection.Append("\r\n");<BR />RequestConnection.Append("accept-version: 1.1");<BR />RequestConnection.Append("\r\n");<BR />RequestConnection.Append("login : " + username);<BR />RequestConnection.Append("\r\n");<BR />RequestConnection.Append("passcode :" + password);<BR />RequestConnection.Append("\r\n");<BR />RequestConnection.Append("\0");<BR />strRequestConnection = Convert.ToString(RequestConnection);</P><P>//oXSocketClient.OnOpen += oXSocketClientOpen;<BR />oXSocketClient.Open();<BR />oXSocketClient.Send(strRequestConnection);</P><P>&nbsp;</P><P>Any ideas ?</P><P>&nbsp;</P><P>Regards</P><P>&nbsp;</P>