problem with updates

hi to all…this morning the updater applet shows me this error and i dont know what to do this error says

PackageKit Error repo-not-available: File ‘/repodata/repomd.xml’ not found on medium ‘
please help me

When I go to that URL I get a n Error 404 (not found). Thus it simply is not there. I do not know why you use this repository, but as it is one from an individual (and not a ‘standard’ one) the individual can simply have stopped his repos.