First, add the following lines to your "/etc/conf.modules" file if not already present:
alias char-major-108 off
alias /dev/ppp off
alias tty-ldisc-3 ppp_async
alias tty-ldisc-14 ppp_synctty
alias ppp-compress-21 bsd_comp
alias ppp-compress-26 ppp_deflate
alias ppp-compress-24 ppp_deflate
Then change your username in "/etc/chap-secrets" and "start-pppoe" from just the plain "username" to "username@online.no", e.g. change "andrlu2" to "andrlu2@online.no"