Can't track transport log on 1 hub server

Hi,

I have 2 Hub Exchange 2010 servers, I want to use a remote management machine to track 2 hub server's transport log, one hub can track log, but the othe one can't track the log, the error is

“Failed to connect to the Microsoft Exchange Transport Log Search service on computer “Exchange_Servername”. Verify that a valid computer name was used and the Microsoft Exchange Transport Log Search service is started on the target computer.” The error message is: Access is denied.”

I'm sure the Transport Log Search service is ok, and I have permission because the other one is working fine.