I have a iBook 14'', with mac OSX.10.5, Airport Extreme and TDSL. Connection cable internet connection shows ok in AirPort also connects, but no connection possible with a browser. There always comes the error message: Could not find a PPPoE server. AirPort can be addressed and the connected USB printer immediately worked. In the "Network" is set to DHCP. Latest software update performed, unfortunately without success. DSL modem, reboot, restart Airport without success.