Vodafone usb Modem(ZTE K3770-z) is not working

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http://askubuntu.com – I have purchased new vodafone usb modem (ZTE K3770-z) and tried to connect it with ubuntu 11.04. But it is not automatically detected on ubuntu. I have installed windows 7 and ubuntu 11.04 on my laptop. To detect the modem on ubuntu I did the following steps :- 1) Connect the modem with laptop and boot the machine with windows 7 2) After detecting the modem on wndows, restarted the machine and enter into ubuntu. Does anyone know any solution to detect the modem automatically on ubuntu? Thanks in advance. (HowTos)