Gah. I remember that horrible control panel. I had to have a bloke from my ISP come out to set it up when I first got the internet in 1997. Shortly after that, I switched to OS 8 with Open Transport. I recall having some sort of problem like that as well at some stage with the original MacPPP, and the solution was to delete some PPP log file from the system folder. I can't remember which file though I think it was in the root of the system folder, and when you delete it, you don't lose the configuration.