update problem ubuntu 12.10 [closed]

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http://askubuntu.com – Possible Duplicate: How can I fix a 404 Error using a PPA? i have a problem with 12.10 i cant update and with sudo apt-get update, the error is: W:Failed to fetch http://ppa.launchpad.net/tiheum/equinox/ubuntu/dists/quantal/main/source... 404 Not Found , W:Failed to fetch http://ppa.launchpad.net/tiheum/equinox/ubuntu/dists/quantal/main/binary... 404 Not Found , E:Some index files failed to download. They have been ignored, or old ones used instead. i have tried many servers.... (HowTos)