I did this and but when i try to update i get this Err http://ppa.launchpad.net quantal/main Sources  404  Not FoundErr http://ppa.launchpad.net quantal/main amd64 Packages  404  Not FoundErr http://ppa.launchpad.net quantal/main i386 Packages  404  Not FoundIgn http://ppa.launchpad.net quantal/main Translation-en_USIgn http://ppa.launchpad.net quantal/main Translation-enIgn http://ppa.launchpad.net quantal/main Translation-en_USIgn http://ppa.launchpad.net quantal/main Translation-enIgn http://ppa.launchpad.net quantal/main Translation-en_USIgn http://ppa.launchpad.net quantal/main Translation-enIgn http://ppa.launchpad.net quantal/main Translation-en_USIgn http://ppa.launchpad.net quantal/main Translation-enIgn http://ppa.launchpad.net quantal/main Translation-en_USIgn http://ppa.launchpad.net quantal/main Translation-enW: Failed to fetch http://ppa.launchpad.net/ingo/ios7support/ubuntu/dists/quantal/main/source/Sources  404  Not Found W: Failed to fetch http://ppa.launchpad.net/ingo/ios7support/ubuntu/dists/quantal/main/binary-amd64/Packages  404  Not Found W: Failed to fetch http://ppa.launchpad.net/ingo/ios7support/ubuntu/dists/quantal/main/binary-i386/Packages  404  Not Found E: Some index files failed to download. They have been ignored, or old ones used instead.