Failed to find package 'lame' (build FC17 live)

[Davide Marchi]

Hi friends,
when i try to build my spin with rpmfusion repository on FC17 x86_64:

(repo --name=rpmfusion-free 
--mirrorlist=http://mirrors.rpmfusion.org/mirrorlist?repo=free-fedora-updates-released-$r...)

livecd-creator doesn't find some packages, one of this lame, from 
rpmfusion-free repo.
(other packages are gstreamer-plugins-ugly xmms-faad2 xmms-mp3..)

locally i've search by yum the same packages and they are correctly 
found on rpmfusion repo. Why livecd-creator doesn't find it?

many thanks