unable to use terminal service

Hello,

We are having an issue with our terminal server. Running Windows Server 2003.

I can remote connect to the server but unable to login under domain name. I can log in as local admin but not domain admin. I get message “Access Denied”.

I restarted “netlogon” service and tried again, then i get “RPC server unavailable”. I am unable to restart RPC service.

Once i reboot the machine then it is good to go. This happens everyday and i am sick of rebooting it.

Assistance would be appreciated.