Possible Duplicate:
How can I fix a 404 Error using a PPA?
Failed to fetch http://ppa.launchpad.net/bisigi/ppa/ubuntu/dists/oneiric/main/binary-amd64/Packages 404 Not Found
W: Failed to fetch http://ppa.launchpad.net/bisigi/ppa/ubuntu/dists/oneiric/main/binary-i386/Packages 404 Not Found
Can anyone tell me why this is happening and how I could fix this?