InvalidOperationException when trying to get services from remote server - vb.net

Question

I am facing a strange error. I check from server A on server B if a specific service is running.
Code sample:
Try
Dim services() As ServiceController = ServiceController.GetServices(server)
For Each service In services
If service.ServiceName = serviceName Then
If service.Status = ServiceProcess.ServiceControllerStatus.Running Then
write_log("Service is running on: " & server)
Return True
Else
Return False
End If
End If
Next
Catch ex As Exception
write_log("ERROR on getService request")
write_log(ex.ToString)
End Try
Most times the request is successful. But sometimes I get an error.
Stack trace:
5316 2015-02-21 07:24:47 System.InvalidOperationException: Cannot open Service Control Manager on computer 'XXXXX'. This operation might require other privileges. ---> System.ComponentModel.Win32Exception: The RPC server is unavailable
--- End of inner exception stack trace ---
at System.ServiceProcess.ServiceController.GetDataBaseHandleWithAccess(String machineName, Int32 serviceControlManaqerAccess)
at System.ServiceProcess.ServiceController.GetServicesOfType(String machineName, Int32 serviceType)
at K2SystemInfo.K2SystemInfo.CheckIfServiceIsRunning(String serviceName, String server)
With a retry immediately after the error I can get the service information. The service that starts my programm is admin on both server.
Why does ServiceController.GetServices(server) sometimes fail. Although it is mostly working fine?
The problem occurs only on Windows Server 2012 R2 servers. On Windows Server 2008 R2 it works fine.