PPPoE can't find a server: it inly works with PPPoE pass through enabled from the router settings

As questioned.....why?!?!?!? put my account and my password fine on the network panel but nothing to do: It works only with this pass through mode. I've got a MBP Retina mid 2013 with Yosemite And a router DSL D-Link G624-T with thunderbolt to ethernet adapter connection. Also the dynamic DHCP setup gives me no connection!!!!! Wi-Fi works fine...thanks god....

Anybody found a solution for those frustrating episodes????