No account names appear on XP login screen

From: Justin (glenlyon2001@hotmail.com)
Date: 11/10/02 

From: "Justin" <glenlyon2001@hotmail.com>
Date: Sun, 10 Nov 2002 10:38:32 -0800

When the login screen comes up, it says to "click on user
name" before entering password. But there are no account
names showing at all! The left side of the screen is
blank. There is only one identity on the machine.....I
know the password.........how can I get a login prompt?
Your help appreciated.