help: a problem to add a login in sql server

Hello,
I am trying to add a login for a Window NT user
in the SQL server but getting following error messages
Error 15401: Windows NT user or group '%s' not found.
Check the name again.
I have checked all the setting in the domain and could not
find anything wrong.
Plese some one can tell me what should I do to fix it.
Thanks
KarenHave had similar problem. Three times in one year. Some advice I've
received was check PDC & BDC sync, verify upper & lower case, but what
seemed to work for me was to reboot the server. I know this is sometimes
unacceptable, but sometimes it works.
You can do a google search also.
Bill
"Karen" <kchen@.grainscanada.gc.ca> wrote in message
news:086101c35c61$64eea390$a101280a@.phx.gbl...
> Hello,
> I am trying to add a login for a Window NT user
> in the SQL server but getting following error messages
> Error 15401: Windows NT user or group '%s' not found.
> Check the name again.
> I have checked all the setting in the domain and could not
> find anything wrong.
> Plese some one can tell me what should I do to fix it.
> Thanks
> Karen