when you installed slackware did you remember what the root password was? i usually write it down and hide it in my wallet behind my money, also try the password with the capslock button pressed if i am not carefull i accidently hit the capslock with my left pinky finger when typing,
also at the lilo boot prompt you can run: Linux init 1 (or is it runlevel 1) and reset a new root password unless that has been disabled...
in /etc/shadow you will see the first line similar to this:
Code:
root:$1$iJLTw/xQ$0.fihy5wG/NEzsXBAKyh/:13998:0:99999:7:::
change it to this
Code:
root::13998:0:99999:7:::
and you can log in without a root password and set a new password for root...
if you feel you need another opinion, just wait and somebody should reply, i trust my own work but it never hurts to get another opinion...