MongoDB auto_reconnect doesn't work

I'm using mongoskin as a wrapper to the native mongodb driver, auto_reconnect doesn't seem to work.

I'm creating the database:

var db = mongo.db(serverUrl, {
    database: database,
    auto_reconnect: true,
    safe: true
});

I added a query on connection close to test it:

db.on('close', function(err) {
    setTimeout(function() {
        db.collection('users').findOne({short_id: '123'}, console.log);
    }, 5000)
});

immediately after running the node process i'm killing and starting mongod, I'm getting '[Error: no open connections]' as the query result.

doesn't it suppose to auto_reconnect on connection lose ? or its trying to auto_reconnect immediately on connection close but mongod isn't up yet ?

can I reconnect manually or do I need to create a new server ?