kubuntu kppp cannot sign-on

[bill]

kubuntu cannot sign on with kppp.
I use kppp on other distros, on this machine.
Setting are the same.
any help appreciated.

Jun 12 17:51:29 bill-desktop pppd[5286]: The remote system is required to authenticate itself
Jun 12 17:51:29 bill-desktop pppd[5286]: but I couldn't find any suitable secret (password) for it to use to do so.
Jun 12 17:51:29 bill-desktop pppd[5286]: (None of the available passwords would let it use an IP address.)
Unable to provide help.