Possible Duplicate:
How can I fix a 404 Error using a PPA?
Keep getting this error, W:Failed to fetch http://ppa.launchpad.net/gdm2setup/gdm2setup/ubuntu/dists/precise/main/source/Sources 404 Not Found , W:Failed to fetch http://ppa.launchpad.net/gdm2setup/gdm2setup/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.
Any help?