[newbie] shutdown problem

[evan light]

Hi there...having a bit of a problem with shutting down 7.0.  When I
issue the "shutdown now" command, everything seems fine and dandy until
it switches into "single-user" mode.  If I try ctl-ald-del at the
single-user prompt, I get the message "no authorized users logged in."
If I try shutdown again, it spins for a bit and goes right back to
single-user mode.  At that point, I couldn't do anything but cringe and
power it off..  Anybody have any ideas?

-evan-