No yum repositories are available after subscribing a new RHEL 6.1 guest system via subscription-manager.

Issue

• After registering a system using subscription manager, Output of " yum repolist" command shows that there are no repositories available.

  [root@example ~]# yum repolist
  Loaded plugins: product-id, subscription-manager
  Updating Red Hat repositories.
  repolist: 0
  
  [root@example ~]# yum -d10 repolist
  Not loading "rhnplugin" plugin, as it is disabled
  Loading "product-id" plugin
  Loading "subscription-manager" plugin
  Running "config" handler for "subscription-manager" plugin
  Updating Red Hat repositories.
  Config time: 0.041
  Yum Version: 3.2.29
  COMMAND: yum -d10 repolist
  Installroot: /
  Setting up Package Sacks
  repolist: 0
  

• "Subscriptions" tab,  shows "Red Hat Enterprise Linux Server, Premium (1 Virtual Machine up to 8 vCPUs)" subscription, but the "Installed Products" field shows "0 / 0