You might need to tell us exactly what settings you have in the PPPoE configuration fields for your WAN (except password and first part of the username of course, we don't need to know that)
The contents of /var/etc/mpd*.conf may also be helpful.
In particular, I'm wondering where the name "nkyx-kent" bit in the log came from. If you have the service name field filled in with that, try erasing it.