WRT120N not recognized at setup

I replaced a WRT120N router with a new one thinking that the old one was damaged.  During setup, the router wasn't recognized.  I used the same connection for a line from the internet to my LAN connectin and the line works fine.  Connecting through the router is no good.  Any Advise?

Hello Tombeam,
I am sorry to hear that the WRT120N is not being recognized at setup. Kindly see if these two links below will be a great help to setup your wireless router.
Setting Up a Router with Cable Internet Service
Setting up a Linksys router for DSL Internet connection

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