Network Load Balancing - "access denied" when loading configuration information from host2

Question

We have 2 Windows 2012 R2 servers, both are running on workgroup.
We set up NLB cluster.  When we open NLB Manager on the server2, then message shows "loading configuration information. Access denied. Error connecting to server1". 
There is no issue doing this on server1, NLB Manager is able to connect to both servers. We login using default administrator account, both account name and password are the same for 2 servers.
When we check security event log on server1, there is this strange Audit Failure log using account "test_nlb" from server2 which related to "Access denied" error. Please let us know how to resolve this. Thanks in advance.
      Event ID: 4776
      The computer attempted to validate the credentials for an account.
      Authentication Package:   
MICROSOFT_AUTHENTICATION_PACKAGE_V1_0
      Logon Account:   
test_nlb
      Source Workstation:   
WPAAP2
      Error Code:   
0xc0000064           
      An account failed to log on.
Event ID: 4625
Subject:
    Security ID:       
S-1-0-0
    Account Name:       
    Account Domain:       
    Logon ID:       
0x0
Logon Type:           
3
Account For Which Logon Failed:
    Security ID:       
S-1-0-0
    Account Name:       
test_nlb
   Account Domain:       
WPAAP2
Failure Information:
    Failure Reason:       
Unknown user name or bad password.
    Status:           
0xc000006d
    Sub Status:       
0xc0000064
Process Information:
    Caller Process ID:   
0x0
    Caller Process Name:   
Network Information:
    Workstation Name:   
WPAAP2
    Source Network Address:   
192.168.70.45
    Source Port:       
55136
Detailed Authentication Information:
    Logon Process:       
NtLmSsp
    Authentication Package:   
NTLM
    Transited Services:   
    Package Name (NTLM only):   
    Key Length:       
0
This event is generated when a logon request fails. It is generated on the computer where access was attempted.
The Subject fields indicate the account on the local system which requested the logon. This is most commonly a service such as the Server service, or a local process such as Winlogon.exe or Services.exe.
The Logon Type field indicates the kind of logon that was requested. The most common types are 2 (interactive) and 3 (network).
The Process Information fields indicate which account and process on the system requested the logon.
The Network Information fields indicate where a remote logon request originated. Workstation name is not always available and may be left blank in some cases.
The authentication information fields provide detailed information about this specific logon request.
    - Transited services indicate which intermediate services have participated in this logon request.
    - Package name indicates which sub-protocol was used among the NTLM protocols.
    - Key length indicates the length of the generated session key. This will be 0 if no session key was requested.

Answer 1

Hi Zhong Gang,
When you are using Network Load Balancing (NLB) Manager, you must be a member of the Administrators group on the host that you are configuring, or you must have been delegated
the appropriate authority. If you are configuring a cluster or host by running NLB Manager from a computer that is not part of the cluster, you do not have to be a member of the Administrators group on that computer. Please disable your nodes firewall and
try again.
The related KB:
Add a Host to the Network Load Balancing Cluster
http://technet.microsoft.com/en-us/library/cc753744.aspx
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