Please be more specific and provide more information so we can help you. By "It doesn't work at all" do you mean you could not launch the program. What error message do you get? Do you at least get the TkPPPOE GUI on screen?
Launch "tkpppoe" as root in a terminal and tell us what error messages you get.
tkpppoe was installed and I could get the GUI screen and clicked the start button.
After a while got the error msg :"connection timed out"