Hello tudou331100,
I think that ssh may need the account to have a password. This might be the last step to make it working :-)
- Open mrxvt
- type the command: passwd
- enter the password you want twice (and write it down!)
Try putty again with user 'root' and your password
Good luck!
PS: When it works, you could help the Iliad community by writing down the steps you had to do into the wiki...
https://wiki.mobileread.com/wiki/Ilia...cting_to_iLiad