Modem disconnect me.

[G0DModE <g0dmode@data.pl>]

Hi!

I can`t connect to my ISP using pon.
/var/log/ppp.log:

----- CUT -----

Jun 23 18:34:44 g0dmode pppd[249]: Serial connection established.
Jun 23 18:34:45 g0dmode pppd[249]: Using interface ppp0
Jun 23 18:34:45 g0dmode pppd[249]: Connect: ppp0 <--> /dev/modem
Jun 23 18:34:59 g0dmode pppd[249]: Hangup (SIGHUP)
Jun 23 18:34:59 g0dmode pppd[249]: Modem hangup
Jun 23 18:34:59 g0dmode pppd[249]: Connection terminated.
Jun 23 18:35:03 g0dmode pppd[249]: Terminating on signal 15.
Jun 23 18:35:03 g0dmode pppd[249]: Exit.

----- CUT -----

I now that my modem hangup, but I don`t now why and how to "fix" it.
I remember that some time ago when I was using minicom to connect I had
the same problem.
The solution was in configuration; the time when modem hangups was set
to 60 sec.
I don`t need to tell what happend after 60 seconds ;) . Can anybody help
me finding option that
hangups my modem?

Big thanks, G0DModE .