Node.JS event error

i have just moved server to Amazon EC2.

Node.JS was working fine before but since moved, it gives me an event error which im not really sure whats going on.

i run command netstat -nlp to see if the ports number are opened.

the ports number are opened (8080 and 8181).

its giving an error on line 89:7 which the following:

https.listen(port, function(){
    console.log('HTTPS Server listening at port: ' + port);
});