dlink wirless router issue

I'm setting up a dlink wireless router, for a friend of mine. they have bellsouth so they use pppoe. I can't get the computer to connect through the router at all anything i should look for
 
USUALLY, the instructions suggest a hardwire connection to configure the
router first. Once it can connect via cable, the wireless card can be configure
in a reasonable manner.
 
What model is the router?

Did you set up the PPPoE on the router first?

How are they having problems connecting? wired or wireless?
 
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