No subject

      2      An  error  was  detected  in processing the options
              given, such as two mutually exclusive options being
              used.

     13     The  link  was  established successfully and termi­
              nated because the connect time limit was reached.

Maybe those errors aren't coming from pppd . . .

Anyway, for general advice I recommend taking a good look at your scripts, 
then connect with minicom and mimic the script and see what is wrong and/or 
try to successfully log on and try to match the script to that once you get 
on by hand.  Usually some junk like "logon" vs. "login" or something.

Good luck!

-Peter