sshd not working

Hello everybody I just install crux 2.3. Unfortunatly ssh is not working if I do ssh -vvv root@hostname I get OpenSSH_4.3p2, OpenSSL 0.9.8b 04 May 2006 debug1: Reading configuration data /etc/ssh/ssh_config debug2: ssh_connect: needpriv 0 debug1: Connecting to inspiron1 [192.168.254.6] port 22. debug1: Connection established. debug1: identity file /home/thierry/.ssh/identity type -1 debug1: identity file /home/thierry/.ssh/id_rsa type -1 debug1: identity file /home/thierry/.ssh/id_dsa type -1 ssh_exchange_identification: Connection closed by remote host ... even after copied /etc/ssh/sshd_config from another working ssh server. Any idea Tanks a lot Thierry