Work under Proxy

[YoongHon0106]

I had try this code in my home. it works well but it can't work in my office under proxy server. I had done with proxy configuration but it can't also

var Pusher = require("pusher");
var pusher = new Pusher({
appId: config.app_id,
key: config.key,
secret: config.secret,
proxy: 'http://username:password@proxyaddress:port#',
timeout: TIMEOUT,
keepAlive: KEEP_ALIVE
});