usb modem

[Alvaro Rosales]

hello guys , I have installed a usb modem andin my FreeBSD 5.1 box, 
the system has created a  /dev/ugen0 and /dev/ugen0.1, but when I try
to do a cu  using ugen0 or ugen0.1 I dont get any answer from the
modem, cu just says that the device is not configured. Is there any
other file I need to configure?, do I have to edit /etc/ttys and add
ugen0 or ugen0.1 ?.
Thanks for your help.