Click Enter to continue. This screen is asking for the type of authentication, select PAP, Click enter to continue. Enter your username. Click enter to continue. Enter in your password, making sure to double check case and spelling.
Passwords ARE case sensitive.
Click enter to continue. This screen is just a review of everything entered into the configuration. Click the exit after you have verified everything to be correct. To start your PPP connection, type ppp-go and it will begin to dial if everything was configured correctly. If it wasn't, just go back through the pppsetup and fix the incorrect data.