Thanks zm0, I'll try the link
@ nihil: I think it's not the problem of keyboard. Because I used my laptop to remote control to the server, and then I keyed in the password by my laptop, the problem is still the same
@SirDice: The error message is: "The system could not log you on. Make sure your User name and domain are correct, then type your password again. Letters in passwords must be typed using the correct case". If the password is expired or locked-out, is there anyway for me to unlock the password?
Thanks