is there a terminal server in Xp Pro?

i know that in win2003 server there is one that you need to install before being able to connect with remote desktop connection.

but in xp pro i can only find terminal service, wich is started. But i cannot connect with RDC. I did configure the router with tcp port 3389.

I always get the message No terminal server installed.

I guess that windoss xp pro cannot be used as a terminal server..?

Thanks