Health Service in which the location monitoring object is contained is not available

Hello,

When i am trying to discover new machines I am getting this error:
Health Service 'OPMGRRMS1.xxx.xxx.xxx.xxx' in which the location monitoring object is contained is not available

All services have been restarted successfully without error... on the RMS Server.
- System Center Data Access
- System Center Management
- System Center Management Configuration
- System Event Notification Service

but still having the error...

Date: 10/27/2009 10:14:00 AM
Application: System Center Operations Manager 2007 R2
Application Version: 6.1.7221.0
Severity: Error
Message: 
Microsoft.EnterpriseManagement.Common.LocationMonitoringObjectNotAvailableException: Health Service 'OPMGRRMS1.ad.medctr.ucla.edu' in which the location monitoring object is contained is not available. Make sure that the computer hosting the Health Service is available and verify that the Health Service is running.
   at Microsoft.EnterpriseManagement.DataAbstractionLayer.SdkDataAbstractionLayer.HandleSubmitTaskIndigoExceptions(Exception ex)
   at Microsoft.EnterpriseManagement.DataAbstractionLayer.AdministrationOperations.LaunchDiscovery(Guid batchId, List`1 jobDefinitions)
   at Microsoft.EnterpriseManagement.Administration.ManagementServer.BeginExecuteWindowsDiscovery(IList`1 discoveryConfigurations, AsyncCallback callback, Object state)
   at Microsoft.EnterpriseManagement.Mom.Internal.UI.Administration.DiscoveryProgress.<>c__DisplayClass7.<SubmitTask>b__3(Object , ConsoleJobEventArgs )
   at Microsoft.EnterpriseManagement.Mom.Internal.UI.Console.ConsoleJobExceptionHandler.ExecuteJob(IComponent component, EventHandler`1 job, Object sender, ConsoleJobEventArgs args)

DW works (Datawarehouse) I restarted the System Center Management successfully
MS works (2nd Management Server) I restarted the System Center Management successfully
ACS works (Audit Control Server) cannot access the reporting server but I restarted the System Center Management successfully

RMS DB 48 % Free
DW DB 18% Free
ACS DB 13% Free

I can ping the RMS Server what other test could I do?

I removed the new items:

Delete the six modules of Windows Failover Clustering Management Pack (SCOM Console > Administration > Management Packs > Right Click delete on it)
Uninstall System Center Operations Manager 2007 R2 Authoring Resource Kit (Add/Remove Programs)
Uninstall System Center Operations Manager 2007 R2 Authoring Console (Add/Remove Programs)
Reboot the RMS Server

SAME ERROR!!! 

Any idea

Thanks,
Dom