I will suggest you to share the Orion log file (\Program files\McAfee\ePO\Server\Logs).
Are you getting the error message 'failed to load the license data'? If yes then I will suggest you to check the connectivity with database. If DB is on remote then please check the connectivity using either ODBC or UDL.
Addtionally I will suggest you to check the db ports in SQL enterprise manager and in db. properties file of ePO server (\program files\McAfee\ePO\Server\Conf\Orion).