socket.io example error message

>node server.js
    info -socket.io started
events.js:66
    throw arguments[1]; //Unhandled "error" event
Error: listen EACCES
    at errnoException (net.js:776:11)
    at Server._listen2.self._handle.onconnection (net.js:900:28)
    at process.startup.processNextTick.process._tickCallback (node.js:244:9)