Maybe this can help.
From the KPPP dialog, go to
Configure > Modem and uncheck the checkbox saying,
Wait for dial tone before dialing
see what happens!
you might also want to read this:
http://db.ilug-bom.org.in/lug-author...rticle-so.html
and this:
http://www.thinkdigit.com/forum/viewtopic.php?t=11970