If you trying to connect to a RDP server and you get this error:
Error message: Terminal Server sessions disabled. Remote logins are currently disabled.
Terminal Server sessions disabled. Remote logins are currently disabled.
Description: The user is attempting to log on to a Terminal Server where an administrator has disabled logon by issuing the CHANGE LOGON /DISABLE command. In order to enable logon, the CHANGE LOGON /ENABLE command must be issued.
http://support.microsoft.com/kb/246109