Please do not post license keys!
Regarding DNS, try to ping your hosts by their fully qualified domain names (e.g. esx1.yourdomain.local) and/or run "Test Management Network" form the DCUI (ESXi console). Usually you'd create a new Host-A entry on your DNS server and add the ESXi host with its IP address to ensure proper name resolution, which is a requirement for HA in vSphere 4.
André