Also make sure that inside the router configuration page that it is set to go through a PPPo connection (DSL). You then have to supply the router with the username and password for the modem. I just hooked up a Belkin wireless router to a DSL connection this weekend, and this is the way I had to do it. To get to the router Web-based interface, open up IE (Internet Explorer) and in the address bar (where you usually type
www.whatever.com) and type in 192.168.2.1 and you should see a Belkin page come up asking for a password. If you have never configured this before, it will be blank. Just hit ok, then proceed to administration and change the password to something you know. After that, check the connection settings, and make sure it is setup for a PPPo connection, and then it should ask you for your DSL username and password (this will be the email address for your DSL service as the username, and whatever password you use to check your email) Try that, and see if the connection stays up.