Huwaei modem not working

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http://askubuntu.com – Yesterday I installed 12.10 in my Sony Vaio laptop. I have Huwaei E173 3G modem, I simply inserted that modem into USB slot, after a few seconds modem started blinking and activated. I opened network profile and created a new network under 'Mobile broadband' tab everything was automated and I felt awesome, infact I used net for a while. Next morning, I placed modem into USB, but nothing happened, no sign of modem presence even the modem is not blinking, I tried creating a new connection once again but attained no luck. Kindly help me in resolving this problem. (HowTos)