Error when trying to install Menulibre in Lubuntu 12.10 [closed]

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http://askubuntu.com – Possible Duplicate: How can I fix a 404 Error using a PPA? When trying to add a PPA (to install menulibre) I get these errors: Err http://ppa.launchpad.net quantal/main Sources 404 Not Found Err http://ppa.launchpad.net quantal/main i386 Packages 404 Not Found W: Failed to fetch http://ppa.launchpad.net/menulibre-dev/devel/ubuntu/dists/quantal/main/s... 404 Not Found W: Failed to fetch http://ppa.launchpad.net/menulibre-dev/devel/ubuntu/dists/quantal/main/b... 404 Not Found Why is that and how to solve it? As the ques (HowTos)