I have solved the problem.
go to this site:
http://www.linuxant.com/drivers/hcf/index.php
#--------------------------------------
#to check out you modem, type:
lspci -v
# then find your modem there, remember the position of
# the modem( the number (example: 00.50). After that type:
lspci -nv
# here find the number of the modem and you can se a number like 14f1:2004 - this is the model of your modem
Now i have some problems with ppp. it says:
pppd: This system lacks kernel support for PPP. This could be because
the PPP kernel module could not be loaded, or because PPP was not
included in the kernel configuration. If PPP was included as a
module, try `/sbin/modprobe -v ppp'. If that fails, check that
ppp.o exists in /lib/modules/`uname -r`/net.
See README.linux file in the ppp distribution for more details.