Brodband connection problem on Ubuntu 12.04

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http://askubuntu.com – You guys know that on Ubuntu 12.04 DSL connection creats problem. It needs pppoeconf to connect with internet. But from today morning its not working also. No net connection on Ubuntu. But everything okay with windows 7. What to do now? I have already tried to setup again pppoeconf, but its not opening. After 100% pppoe gets hanged. (HowTos)