Error: ENOTSUP, Operation not supported (_doListen)

[knoxmic]

Hi, I want to use http://learnboost.github.com/cluster/ on my server, but with the demo code on github, I get this error message:

events.js:23
throw arguments[1]; // Unhandled 'error' event
                   ^
Error: ENOTSUP, Operation not supported
at Server._doListen (net.js:1062:5)
at net.js:1010:16

NodeJS version is v0.4.2.

app.js:

var http = require('http');
module.exports = http.createServer(function(req, res){
  console.log('%s %s', req.method, req.url);
  var body = 'Hello World';
  res.writeHead(200, { 'Content-Length': body.length });
  res.end(body);
});

server.js:

var cluster = require('cluster')
, app = require('./app');
cluster(app)
  .use(cluster.logger('logs'))
  .use(cluster.stats())
  .use(cluster.pidfiles('pids'))
  .use(cluster.cli())
  .use(cluster.repl(8888))
.listen(3000);

Can anybody help?

[knoxmic]

Shell restarted, problem gone...