Just fought this battle with my Netgear WGR614 v7 Router. With my Motorola 2210 modem with ATT ADSL service.
Everyone said I need to program router to accept ADSL logon password. Somehow "bridge" or disable modem and let router do the work. I didn't have to do any of that stuff. If you have a Modem/Router device instead of just a modem then maybe you need to bride... maybe not.
I ran the Netgear setup wizard and it correctly identified my PPPoE connection. It then asked for my modem login and password.. and REQUIRED me to put that in. But router wouldn't work with modem.
I had to go into Advanced setup mode in the Router and set it back to NO where you tell it if ISP requires login and password. Wizard set it to YES, which is effectively wrong in this case.
Solution was so simply I almost missed it. Here's the thing. Modem already logs you onto the ISP so router doesn't have to. So we don't need to re-enter our ISP-Modem login and password again in the modem.
A simply 2 minute setting adjustment to undo the Wizard settings, and my router works just fine with my ADSL modem.
Took me 5 hours of web surfing and fiddling with router to learn I didn't need to do anything fancy, and learn that the Netgear Wizard incorrectly set up my modem. Another hour of studying advanced settings, and it fell into place for me.
Maybe this note will save someone else from the hassle. ATT techs would discuss the Netgear modem. Netgear techs all wanted to dissable or bridge the modem. Simply solution is so simple maybe it took a simply mind like mine to figure it out. I dunno.