you may want to uninstall openssh, and then try the following:
Add the correct repository entry for ssh to your application catalog - if it's not already there. This can be done through the app manager or manually by editing /etc/apt/sources or something like that (I don't have my tablet w/me). If you use the app manager to do this close it when you are done.

http://repository.maemo.org/
mistral
free

http://repository.maemo.org/
mistral
non-free

in xterm:
become root
>apt-get install ssh

answer yes to everything.

This should set everything up. If you haven't yet - you should create a password for root:

>passwd

This is how I have set up ssh several times with no problems.