TIME SERVER task not passing on OS X

[Marqin]

I've tested this on my Linux PC and this code passes there. Problem is with OS X 10.10 MacBook Air learnyounode verify

Error I'm getting:

✗ Error connecting to localhost:20952: connect ECONNREFUSED

Your submission results compared to the expected:

                 ACTUAL                                 EXPECTED                
────────────────────────────────────────────────────────────────────────────────

   "2015-08-02 20:08"                  !=    ""                                 
   ""                                  !=                                       

────────────────────────────────────────────────────────────────────────────────

✗ Submission results did not match expected!

# FAIL

Your solution to TIME SERVER didn't pass. Try again!

with code:

var net = require('net');

function putZero ( x ) {
    return ( ( x < 10 ) ? "0" : "") + x;
}

var server = net.createServer( function( socket ) {
  var date = new Date();
  var timedate = date.getFullYear() + "-" + putZero(date.getMonth()+1) + "-" + putZero(date.getDate());
  timedate += " " + putZero(date.getHours()) + ":" + putZero(date.getMinutes());

  socket.write( timedate + "\n" );
  socket.end();
});

server.listen( process.argv[2] );

Of course, learnyounode run time.js prints right time. Also running with node time.js 20952 and telneting to it works OK on OS X.