Jboss with ELB load Balancer

Our Jboss EAP 6 is running in EC instances. We have a load balancer(Elastic Load balancer-Classic type) connecting the 3 Jboss servers. Our configuration works fine for http connection of load balancer. Recently we configured the load balancer with https on port 443 for the client to ELB connection and port 8080 for the connection from ELB to the Jboss instancess. But after the configuration, we are not able to login our application. We brought down two Jboss with only one running. Now the application login works. Can you please suggestion if anything need to be configured for the Jboss to receive the request for the LB on port 8080.