Why doesnt motorola dsl modem 3360 connect to internet?

So the old dsl modem I had stoped working so I bought a motorola dsl 3360 I have At&T high speed internet and connected it.to computer i open the browser and adjusted the new modem and after that I can't get internet service and i also use a netgear wireless router so what do I do to get internet service the... show more So the old dsl modem I had stoped working so I bought a motorola dsl 3360 I have At&T high speed internet and connected it.to computer i open the browser and adjusted the new modem and after that I can't get internet service and i also use a netgear wireless router so what do I do to get internet service the motorola modem cable is connected correctly with netgear router
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