Vodafone mobile broadband dongle not connecting in FC 17

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http://forums.fedoraforum.org – Hello All, I have Vodafone Mobile dongle. It is detecting by Fedora 17 BUT when i going to connect it not give any error or nothing just "Preparing to Connect" after that not connect. the same way if i connect it in windows it connect easily. Kindly guide me to connect in linux because for that only i need to go for windows and use internet . Thanks in Advance Surajprakash (HowTos)