simple proxy server that works on a node.js host like appfog

We'd like to surf the internet through a node.js proxy on appfog.

We tried this code:

proxy2a.js:

var http = require('http');

var port = process.env.VCAP_APP_PORT || 8080;
  console.log ('the portnumber is:   '+ port) ;
http.createServer(function(request, response) {
    var proxy = http.createClient(80, "checkip.dyndns.org");
    var proxy_request = proxy.request(request.method, request.url, request.headers);
    proxy_request.on('response', function (proxy_response) {
        proxy_response.pipe(response);
        response.writeHead(proxy_response.statusCode, proxy_response.headers);
        console.log(proxy_response.statusCode)  ;
    });

    request.pipe(proxy_request);
}).listen(port);

package.json:

{
    "name": "proxy2a",
    "author": "parker",
    "version": "0.0.0-14",
    "dependencies": {



    },
    "devDependencies": {},
    "optionalDependencies": {},
    "engines": {
        "node": "0.6.x",
        "iisnode": "*"
    },
    "scripts": {
        "start": "node proxy2a.js"
    }
}

We have the code from this question. (Actually we need the server only to access one website, so it is fine that this server only serves one.) This code works great when we run the server on our local machine.(Use node version 0.6.x.) But when we deploy to appfog, there is no reaction. (We get the ip by pinging the deploy url with another console.) Do you know how to get such a proxy server to work on appfog or any other node.js host?