user cannot connect from a remote site

[Guest]

Hello,
I have a user that cannot connect from a windows xp pro machine in Bermuda
to a windows 2000 terminal server.
I have verified that there is enough licenses on the server and can connect
from other machines.
When reviewing the logs I get the following errors when he is trying to log
in:

Event Type: Error
Event Source: Userenv
Event Category: None
Event ID: 1000
User: NT AUTHORITY\SYSTEM
Computer: OFFICE
Description:
Windows cannot determine the user or computer name. Return value (1326).

And

Event Type: Information
Event Source: TermService
Event Category: None
Event ID: 1004
User: N/A
Computer: OFFICE
Description:
The terminal server cannot issue a client license.

Are there any articles or advice that you can give me?
Thank you,

 

[Vera Noest [MVP]]

Value 1326 - "Logon failure: unknown user name or bad password."

EventID.net has lots of examples for this error:
http://www.eventid.net/display.asp?eventid=1000&eventno=546
&source=Userenv&phase=1

The most likely cause is that the client is running (ZoneAlarm)
firewall. But there are others listed as well.