serial device looped back?!

In trying to set up PPP, I've been unable to fix this problem:

I dial into the ISP (and I've tried 2 different ones - same results) with minicom, then I quit without a modem reset, and type "pppd -d -detach /dev/modem &"
at this point the modem always just hangs up.
If I look in /var/log/messages, I always get a "serial device looped back" message right after ppp connects. All the docs that I've found assume a problem with a script or something like that, but I'm not using one yet! help?
jon-oAsked:
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duxCommented:
Try this script:
(you must modify some variables)

/usr/sbin/pppd debug lock modem crtscts /dev/modem 38400 \
asyncmap 20A0000 escape FF kdebug 0 $LOCAL_IP:$REMOTE_IP \
noipdefault netmask $NETMASK defaultroute connect $DIALER_SCRIPT

DIALER_SCRIPT is:


exec chat -v                                            \
        TIMEOUT         5                               \
        ABORT           '\nBUSY\r'                      \
        ABORT           '\nNO ANSWER\r'                 \
        ABORT           '\nRINGING\r\n\r\nRINGING\r'    \
        ''              \rAT                            \
        'OK-+++\c-OK'   ATH0                            \
        TIMEOUT         60                              \
        OK              ATDP$TELEPHONE                  \
        CONNECT         ''                              \
        sername:--sername:      $ACCOUNT                \
        assword:        $PASSWORD




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