aws - how to access opsWorks app with ELB?

My app was easy deployed on 3 instances using OpsWorks. I can Access it using instance IP's fine.

My question is: how can I access it using load balancer?

ELB says all 3 instances are InService, but typing public DNS on browser, it loads forever and shows nothing.

Testing ELB public DNS on http://whatsmydns.com it shows IP's that aren't from my instances.

Am I doing something wrong?

I have added Public DNS to my app as hostname.