Issue in SSL node.js

SSL_Node

I have created self signed certificate using openssl and used in node.js ssl.But i can not connect from client to server.
My server side code is

var express = require('express');
var app = express();
var file = require("fs");
var http = require('https');
var sslOptions = {
   key: file.readFileSync('./cert/server.key'),
   cert: file.readFileSync('./cert/server.crt'),
   ca: [ file.readFileSync('./cert/ca.crt')],
};
var server = http.createServer(sslOptions,app);
var io = require('socket.io').listen(server);

io.sockets.on('connection', function (socket) {
   console.log("on connect");
}
server.listen(8088);

And my client side code is

<script src="https://localhost:8088/socket.io/socket.io.js" type="text/javascript"></script>
var socket = io.connect('https://localhost:8088/', { secure: true });
socket.on('connect', function () {
  console.log("connect");
});
socket.on('error', function (data) {
    console.log('error');
});

Now I can not connect from client to server.I guess its ssl certificate load issue from client side.Do I need to add anything in client side as well? 
Also while creating self signed certificate using openssl,Do i need to mention about "common name"?I have tried with "localhost" and blank name.

Thanks,
Urmik