Windows.Net Server 2003 Terminal Services Problem

>-----Original Message-----
>Hi,
>
>I have a Windows.Net 2003 Server set up with Terminal

>sitting behind a firewall but I forward all traffic from

>3389 to the server.
>
>I can connect to the server OK over the Internet using

>different computers with Windows 2000 and XP.
>
>But... I am trying to get someone in Italy to connect to

>They are using a Windows XP PC on their corporate

>
>When they try to connect they get an error message

>
>vbscript: Remote Desktop Disconnected
>The client could not connect to the remote computer.

>connections might not be enabled or the computer might

>accept new connections........
>
>They have also got the error message:
>vbscript: Remote Desktop Disconnected
>An internal error has occurred.
>
>Any ideas how to sort this? I have tried everything I

>
>Thanks in advance,
>
>Regards,
>
>Will
>.
>