Description of problem: The file is called ssss-0.5-2.fc6.x86_64.rpm on FC7, but it must call ssss-0.5-2.fc7.x86_64.rpm.
The ".fc6" disttag only changes to ".fc7" when the package needs to be rebuilt for Fedora 7. It hasn't needed to be rebuilt and therefore the package is still using the FC6 disttag.
http://docs.fedoraproject.org/release-notes/f7/en_US/sn-PackageNotes.html See section 8.5