Possible Duplicate:
How can I fix a 404 Error using a PPA?
W: Failed to fetch http://ppa.launchpad.net/jsevi83/unity/ubuntu/dists/precise/main/source/Sources 404 Not Found
W: Failed to fetch http://ppa.launchpad.net/jsevi83/unity/ubuntu/dists/precise/main/binary-i386/Packages 404 Not Found
E: Some index files failed to download. They have been ignored, or old ones used instead.
I get this at the end of trying to update. HELP!