fc4 extras?

I'm using apt with fc4.
/etc/apt/sources.list contains the line:

# Fedora Core 4 - i386 - Extras
rpm http://ayo.freshrpms.net fedora/linux/4/i386 extras

after running apt-get update got:

...
Get:2 http://ayo.freshrpms.net fedora/linux/4/i386/extras release [155B]
Fetched 1039kB in 9s (113kB/s)
Reading Package Lists... Done
Building Dependency Tree... Done
W: Release file did not contain checksum information for
http://ayo.freshrpms.net/fedora/linux/4/i386/base/pkglist.extras
W: Release file did not contain checksum information for
http://ayo.freshrpms.net/fedora/linux/4/i386/base/release.extras
W: You may want to run apt-get update to correct these problems

Is it a server problem? Or incorrect configuration? Or may be I should try
another  mirror? Which one? I already tried ayo.ie.freshrpms.net and
ayo.us.freshrpms.net with the same result.

Thanks,
Alex