Solve : Getting Error 756 how can i fix?

1.	Solve : Getting Error 756 how can i fix?
Answer» I'm trying to connect to the internet using sprints sierra modem 250U. It keeps giving me error 756 this CONNECTION is already being dialed, it does find a connection but when ever i hit connect gives me that error. I've tried scanning my PC for bots and other things but has done nothing anyone can help WOULD be greatly appreciated. I am using windows VISTA and windows 7 on the other PC I can connect to the internet using my regular broad band connection i USUALLY turn this off when trying to access the one with sprint.

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