DSL Connection problems


Whenever I try to connect to the internet in OS X using the built-in PPPoE, it doesn't work. When I click connect in the internet connect application, it says contacting ppp server for a few seconds, then it switches back to idle. I have all my settings the same as I do on my other computer, running os 9.1, and it works fine using EnterNet to connect, but how can I connect my OS X machine?