I've been trying to get a USB CDMA Wireless Multitech modem to work. I keep getting a "Loopback detected" error in my system log with the LCP Terminate Request message. Here are my options:

/dev/usb/ti/0
115200
crtscts
noauth
defaultroute
noipdefault
modem
name 6035485276@vzw3g.com
novj
novjccomp
nopcomp
noaccomp
noccp
asyncmap a0000
lock
connect '/usr/sbin/chat -v -f /etc/ppp/chat-verizon'

I'm running a version based on Feather Linux kernel version 2.4.23, with gate.brimson.com's USB modem drivers (ti_usb-1.1.tgz). I've heard that my loopback problems may be related to having the wrong option selected, but even running a minimal set with just "/dev/usb/ti/0", "115200", "lock", and "connect ..." returns the same errors. Any ideas why I'm hitting this brick wall?