another instance of kppp seems to running under process - id 13042
Make sure you're not running another kppp,delete the pid file , and restart kppp
this happens when kppp doesn;t close properly (when it crashes for example). this means that its lock file, kppp.pid. still exists which usually means that kppp is already running. if you delete this file kppp will run normally again and recreate the file (it does this when run normally anyway. upon starting up it creats this file, then when it closes it deletes it).
does you ISP cut you off after a certain period or time? sometimes ISPs cut you off if you haven't been using your connection for sometime. try keeping your email client open at the same time and checking for messages every 2 minutes or so.