My company has 3 sites at 3 cities.

 First, I installed AD RMS (Windows Server 2K8 R2 SP1) at HO (head office).

 Now, when I install a second (addtionnal) AD RMS at 2 brand office and want to join them into the same cluster with guideline:

http://technet.microsoft.com/en-us/library/cc754578%28v=ws.10%29.aspx

 And so I get error:

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 Warning: Windows automatic updating is not enabled. To ensure that your newly-installed role or feature is automatically updated, turn on Windows Update in Control Panel.

Active Directory Rights Management Services: Installation succeeded with errors
   Error: Attempt to configure Active Directory Rights Management Server failed.  There is a problem logging in as the service account.  Either the entered domain, user name, and password are incorrect, or the user does not have permissions to log in to the local machine. Verify your user configuration and try again.    at Microsoft.RightsManagementServices.Configuration.ProvisioningBase.VerifyServiceAccountCredentials()
   at Microsoft.RightsManagementServices.Configuration.ProvisioningBase.CheckInstallationEnvironment(String strDatabaseName, String strDBServerName)
   at Microsoft.RightsManagementServices.Configuration.ProvisioningBase.Run()
   at Microsoft.RightsManagementServices.Configuration.ProvisionerBase.DoProvision()
   at Microsoft.RightsManagementServices.Configuration.ProvisionerHelper.Run(OperationType operationType, Object data)
   at Microsoft.RightsManagementServices.Configuration.CmdLineHandler.Run()
Remove and re-install AD RMS to attempt provisioning again.
   Warning: Before you can administer AD RMS on this server, you must log off and log on again.
   Informational: <a href="rms_help.chm|html/a928c435-77a8-49fe-b08e-bfdc6bcc1fa7.htm">If the AD RMS cluster has been configured for SSL, you must import and configure the cluster's SSL certificate on this server.</a>
   The following role services were installed:
   Active Directory Rights Management Server
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I'm sure the user and password are correct. But I dont know why???

Someone help me to fix it.

Thanks !!!