Networking :: Net not connecting now.

I have dial up connection. Net was working fine till 4 days back. Then if i tried to connect normally via PPPoE its not connecting now. It Exits. What may be the reason. No settings are changed. Thats for Sure.

Some times Net is working.
But many times after connecting, in the "sudo" terminal some "script says as Finished and gives HangUp on Exit "like this. I.e. it terminates without any reason .

What may be the reason.

original here.