HELP!!!, can't login even as root

[arodriguez31@cfl.rr.com]

Running sid, computer went bananas. Gnome terminal 
froze. Logged out from X. Couldn't come back. 
Rebooteed. This is what happens: 
 
INIT: cannot excute "/etc/init.d/rcS" 
INIT: Entering runlevel:2 
INIT: cannot execute "/etc/init/d/rc" 
INIT: cannot execute "/usr/sbin/secvpnmon" 
same same same 
Id "SVPN" respawning too fast: 
disabled for 5 minutes 
(none) login: {I enter root} 
Password: {I enter root password} 
Unable to change tty /dev/tty1: Read-only file 
system. 
Cannot execute /bin/bash: Permission denied. 
Debian Gnu/Linux 3.1 (none) tty1 
(none) login: 
{I do again Control + Alt + Delete} 
Init: Switching to runlevel:6 
INIT: Sending processes the TERM signal 
INIT: Sending processes the KILL signal 
INIT: cannot execute "/etc/init.d/rc" 
Give root password for maintenance 
(or type Control-D to continue) 
{I enter root password} 
/bin/bash/: Permission denied 
/bin/sh: Permission denied 
Login incorrect 
Give root password for maintenance 
(or type Control-D to continue. 
 
After several of these cycles I give up, pull my 
Knoppix CD, boot from it, and from this yahoo 
account send this desperate SOS to my debian 
fellow users. 
 
A few mintes after, from webmail at rr i repeat 
the message. I think from the yahoo account it 
didn't make it.