How do I unlock a specific user for telnet?

From: Linux Lover (linuxlover992000_at_yahoo.com)
Date: 09/13/04 

Date: 13 Sep 2004 11:17:54 -0700

Running RedHat 9, I am able to log in as root, but I cannot telnet
using the single user account I defined in the system. As root, I
reset the password (using passwd) for that userid, but this doesn't
help - I still cannot telnet into the system using that single user
account.

I created a new (different) user account. No problem - this one is
able to telnet without any problem from the same exact host.

It seems that the first userid got "locked" for some reason, and now
telnet refuses authentication to that userid only.

My question is: how do I unlock it?

Thanks,
Lynn

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