Terminal Service error with Win XP

[Guest]

I have a windows 2000 adv server with terminal service running in Application
server mode. All machines are able to connect except two XP machines. These
machines gives an error invalid protocol or invalid license when taking ts to
the server. I can take TS to other machines from the same desktops at that
time.

Any one has faced this issue?/

Regards
Vipin

 

[DJ Borell]

Do you have enough licenses for the number of simultaneous connections?