This is a symptom of using the incorrect licensing method on the server. On the windows RDP client, there is a registry key to delete when you get this error.
Code: Select all
[-HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\MSlicensing]
possibly there's some licensing file/key in your home directory you can delete? alernatively, i've seen people report success using the option "--built-in-license" when starting rdesktop. I've not tried it, because so far, I've not had that problem.