Hi John,
i found that i had to check the registry in the backup exec server at:
HKEY_LOCAL_MACHINE\SOFTWARE\Symantec\DLO\3.0\DB
to get my details to put into the registry on the client.
after i checked i found that i had the wrong name in the DBInstance. it was set as 'BKUPEXECDLO' when it should be 'BKUPEXEC'.
my DBName is 'BE_DLO'
hope it helps