Updating on Ubuntu 11.10?

[SunDancer]

Hello all,

When Updating I get the following error:

> W:Failed to fetch http://ppa.launchpad.net/pidgin-developers/ppa/ubuntu/dists/oneiric/main/source/Sources  404  Not Found
> , W:Failed to fetch http://ppa.launchpad.net/pidgin-developers/ppa/ubuntu/dists/oneiric/main/binary-i386/Packages  404  Not Found
> , E:Some index files failed to download. They have been ignored, or old ones used instead.

Are these Updates Missing?

Regards