It starts working after updating the recent updates for Ubuntu PidGin, Thanks!
-- Yahoo server authentication changed: Pidgin =<2.5.6 will not connect to Yahoo! servers. https://bugs.launchpad.net/bugs/389322 You received this bug notification because you are a member of Ubuntu Backports Testing Team, which is subscribed to Hardy Backports. -- ubuntu-backports mailing list ubuntu-backports@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-backports