i tried to ssh from my Ubuntu machine to my N900.

First I had this output:

The authenticity of host 'nokia-n900-42-11 (192.168.1.3)' can't be established.
RSA key fingerprint is a4:0e:44:de:10:41:f3:07:8b:55:ad:5b:f8:e9:d9:54.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'nokia-n900-42-11,192.168.1.3' (RSA) to the list of known hosts.

Then,
root@nokia-n900-42-11's password:

and after insterting my password:
sh: 192.168.1.3: not found

Do you know what can I do now?

Thanks a lot.