...just would like to confirm that I face the same experience as Cosy.
Ther error msg is "unknown user name or bad password"
...and yes, I tried with "admin" as well as "root", - same shit.
I also tried to create a user group with the describtion "Domain Admins" as mentioned earlier on Contribs.org, but same error...
Just a thought:
Since I test with Swedish version of XP, would there be any connections to the name of the local XP Administrator account?
(Of course, this account name differs from one language edition to another in XP

)