After removing libmissioncontrol the N800 became very unstable....

now when i try to write in xterm "sudo su -" appear "Sorry, user user is not allowed to execute '/bin/su -' as root on Nokia-N800-39."
o_O coooool
everything I try to to is a "permission denied" (cat: /etc/sudoers: Permission denied)

I rember that I did from my pc via ssh (after logging in as root/rootme) "passwd -l root"....

I'm really stuck!!!

P.s. i cannot reboot to reach the bootmenu I can only poweroff with the power button!!!!
and "apt-get update" gives to me:
E: Could not open lock file /var/lib/apt/lists/lock - open (13 Permission denied)
E: Unable to lock the list directory

help