Error while configuring another active directory

[smtest]

I am getting this error, while configuring another active directory:
['Active Directory1']
1. [ ERROR ] CAM-AAA-0146 The namespace 'NA_AD' is not available.
CAM-AAA-0064 The function 'CAM_AAA_Configure2' failed.
CAM-AAA-0089 The provider is not initialized.
ADSI Error HRESULT Returns:
ERROR_DS_SERVER_DOWN
ADSI Error:

System Error:
The server is not operational.

CAM-AAA-0124 The Active Directory function call to 'getDomainTreesTopology' failed.

please advice

[nelson.ordonez@db.com]

Could you please let me know how did you fixed this issue! - thanks in advance!