Problem authenticating the user on Linux

I created a user say "joe" on host "myserver1" and assigned a password "hello" to this user.
Then I copied this user's password entry in /etc/shadow which contains the encrypted version of "hello" and place it on another host "myserver2" after creating user "joe" on "myserver2". These machines are running in a cluster.
I want them to have the same user information. I can log on "myserver1" using user "Joe" and password "hello"
successfully using both "telnet" and "ssh". However, if I logged on to myserver2 using SSH "ssh joe@myserver2" and enter "hello" as the password. SSH complained "Permission denied".

Do anyone know why telnet allows me to log in, but ssh doesn't? I need to create users inside a program, I can't do it interactively on each machine.

I'm using OpenSSH_v3.4p1 on Debian Linux.

Thanks much in advance,
An Received on Wed Jan 29 10:26:26 2003