Why can't I set up a session.?

Question

Node.js

var	express=require('express'),
  session = require('express-session');
var options = {
    host: '127.0.0.1',
    port: 3000,
    user: 'nodejs',
    password: 'c5c58f',
    database: 'nodejs'
}
var SessionStore = require('express-mysql-session');
var app=express();
app.use(session({
    key: 'session_cookie_name',
    secret: 'session_cookie_secret',
    store: new SessionStore(options)
}))
app.use(function(req,res,next){
  console.log(req.session);
});
http.createServer(app).listen(8080,function(){
  console.log('server run');
});

The server does not crash, I caught the error through

app.use(function(err,req,res,next){ // error
  if(app.get('env')=='development'){
    console.log();
    res.end('Error');
  }else{
    res.status(err.status||500);
    res.render('error');
  }
})

error when accessing address 127.0.0.1:8080

{ Error: connect ECONNREFUSED 127.0.0.1:3000                                    
    at Object.exports._errnoException (util.js:1016:11)                         
    at exports._exceptionWithHostPort (util.js:1039:20)                         
    at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1138:14)             
    --------------------                                                        
    at Protocol._enqueue (D:\server\apache\node_modules\mysql\lib\protocol\Proto
col.js:141:48)                                                                  
    at Protocol.handshake (D:\server\apache\node_modules\mysql\lib\protocol\Prot
ocol.js:52:41)                                                                  
    at PoolConnection.connect (D:\server\apache\node_modules\mysql\lib\Connectio
n.js:130:18)                                                                    
    at Pool.getConnection (D:\server\apache\node_modules\mysql\lib\Pool.js:48:16
)                                                                               
    at Pool.query (D:\server\apache\node_modules\mysql\lib\Pool.js:202:8)       
    at MySQLStore.get (D:\server\apache\node_modules\express-mysql-session\lib\i
ndex.js:130:19)                                                                 
    at session (D:\server\apache\node_modules\express-session\index.js:460:11)  
    at Layer.handle [as handle_request] (D:\server\apache\node_modules\express\l
ib\router\layer.js:95:5)                                                        
    at trim_prefix (D:\server\apache\node_modules\express\lib\router\index.js:31
7:13)                                                                           
    at D:\server\apache\node_modules\express\lib\router\index.js:284:7          
    at Function.process_params (D:\server\apache\node_modules\express\lib\router
\index.js:335:12)                                                               
    at next (D:\server\apache\node_modules\express\lib\router\index.js:275:10)  
    at cookieParser (D:\server\apache\node_modules\cookie-parser\index.js:70:5) 
    at Layer.handle [as handle_request] (D:\server\apache\node_modules\express\l
ib\router\layer.js:95:5)                                                        
    at trim_prefix (D:\server\apache\node_modules\express\lib\router\index.js:31
7:13)                                                                           
    at D:\server\apache\node_modules\express\lib\router\index.js:284:7          
  code: 'ECONNREFUSED',                                                         
  errno: 'ECONNREFUSED',                                                        
  syscall: 'connect',                                                           
  address: '127.0.0.1',                                                         
  port: 3000,                                                                   
  fatal: true }