Can't update repo problem!!

[BRPSA]

Hi!!! I'm having trouble with my repositories, everytime the system tries to update appears this.

GPG error: jaunty http://ppa.launchpad.net Release The following signatures could not be verified because the public key is not available: NO_PUBKEY 3F2A5EE4B796B6FEError GPG: jaunty http://ppa.launchpad.net not Release The following signatures could be verified because the public key is not available: http://de.archive.ubuntu.com/ubuntu/ubuntu/dists/hardy/main/binary-i386/Packages NO_PUBKEY 13551B881504888CImposible get 404 Not Found [IP: 141.30.3.85 80]
Failed to fetch 404 Not Found http://ubuntu.mirrors.tds.net/ubuntu/ubuntu/dists/hardy/main/binary-i386/Packages
Failed to fetch file ftp://ftp.osuosl.org/pub/ubuntu/ubuntu/dists/hardy/main/binary-i386/Packages impossible to bring the server said 'Failed to open file. '
Some index files have not been able to download, they have ignored,
or old ones used instead.

Since I've moved to another country I've changed my server and let ubuntu to choose te best one for the area.
I really don't have a clue what have happened.

Thanks!!!