Ubuntu Networking :: Cannot Connect With The USB Modem?

I've just spent 2 days of extensive lurking how to solve this problem. Namely, i have ZTE usb modem, model MF626 T. The sofware provided with it works only under windows. What i tried first was to download hso.ko module (copied to the /lib/modules/`uname r`/kernel/drivers/usb/serial/). Then i downloaded hsolinkcontrol and HSOconnect. Unfortunately, i didn't get those /dev/ttyHS* ports that should appear. Only /dev/ttyUSB*. I blacklisted option module. Then changed occurences of ttyHS* to ttyUSB* in .py sources for HSOconnect. what i get is the popup interface GUI that has "connect" button disabled. Then i tried to set up connection via gnome-ppp. The usb modem was automatically detected as /dev/ttyUSB1. But when i supply telephone number that i got with the stick, i get message after "Sending: ATM1L3DT*99*" ->"no carrier found". Then i tried to copy the other two modules i found on the net-airprime.ko and usbserial.ko. I've renamed the option.ko and old usbserial.ko in order to use them later if needed. And also i've put in /etc/udev/rules.d/
some scripts i've found on net, used to mount and unmount ZTE modem. None of all that worked, and somehow i have the feeling i've messed up everything. What i just posted above is the sum of everything i googled out. I would be very glad if someone would help me out with this. I usually like to spend some time lurking and googling, but this is simply taking too much time...