[newbie] kppp error

[Juggernaut]

Hello...
I tried to connect to internet with kppp. And then, I get error message like
this :

"pppd daemon died unexpectedly"
Details :
pppd : By default the remote system is required to authenticate itself.
pppd : (because this system has a default route to the internet).
pppd : but I couldn't find any suitable secret (password) for it to use to
do so.
pppd : (none of the available passwords would let it use an  IP address).

I don't know what does it mean. Anyone can help me ?
Thanks.

-Pungki