title: Can't register EC2 instance in ELB
body: <p>I'm trying to set up an AWS environment for the first time and have so far got a DNS entry pointing to a Classic ELB. I also have an EC2 instance running but I don't seem to be able to add the EC2 instance to the ELB in the UI. The documentation says that I can do this in the "Instances" tab in Load balancer screen but I don't have the tab at all. All I can see is Description | Listeners | Monitoring | Tags. </p>
  
  <p>Does anyone have any ideas why the "Instances" tab night be missing from the UI?</p>