Hi Ronald
does your SME's /etc/inittab file contain a pptp entry which says EXACTLY:
pptp:357:respawn:/usr/sbin/pptpd -f
Also, have you done anything different to the pptp installation ?
What version of windows are you trying to connect with ? Have you updated the Dial-up-networking to DUN 1.4 if using Win98 ?
Damian