用https.request模拟post请求出现异常：

 { [Error: connect ECONNREFUSED],code: 'ECONNREFUSED',  errno: 'ECONNREFUSED', syscall: 'connect' } 

代码如下：

var https=require("https");
var querystring=require("querystring"); 
var contents=querystring.stringify({
    password:"1213mzl",
    identity:"15989492323",
    token:"1cb42f5d9df6f9d468ffb755723149c1"
});
var options={
    host:"shenzhen.baixing.com",  
    path:"/oz/login/x",  
    method:"post",
    headers:{
        "Content-Type":"application/x-www-form-urlencoded",  
        "Content-Length":contents.length,         
        "Accept":"text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8",     
        "Accept-Language":"zh-CN,zh;q=0.8,en;q=0.6",  
        "Cache-Control":"max-age=0",  
        "Connection":"keep-alive",    
        "Host":"shenzhen.baixing.com",  
        "Referer":"http://shenzhen.baixing.com/oz/login/x",         
        "User-Agent":"Mozilla/5.0 (Windows NT 5.2) AppleWebKit/537.36 (KHTML, like Gecko)"  
    }  
};
var request=https.request(options,function(res){      
    res.setEncoding("utf8");
    res.on("data",function(data){  
        console.log("data:"+data);  
    });
});
request.on('error', function (err) {
    console.log(err);
});
request.write(contents);
request.end();

请大侠帮帮忙，如何解决。