how to rsync the ubuntu-mirrors?

[sankergg]

hello everyone,
I have a local rsync mirror,and there is a cron task every 12 hours  to exec rsync with the rsync url 
"rsync://ftp.yz.yamagata-u.ac.jp/pub/linux/ubuntu/archives/ ".  And it works well.
But when I do "apt-get update",it displays the the flowing word:
"""
W: Failed to fetch http://192.168.5.224/ubuntu/dists/hardy-updates/main/binary-i386/Packages.bz2  Hash Sum mismatch
W: Failed to fetch http://192.168.5.224/ubuntu/dists/hardy-updates/main/source/Sources.bz2  Hash Sum mismatch
W: Failed to fetch http://192.168.5.224/ubuntu/dists/hardy-updates/universe/binary-i386/Packages.bz2  Hash Sum mismatch
W: Failed to fetch http://192.168.5.224/ubuntu/dists/hardy-updates/universe/source/Sources.bz2  Hash Sum mismatch
W: Failed to fetch http://192.168.5.224/ubuntu/dists/hardy-updates/multiverse/binary-i386/Packages.bz2  Hash Sum mismatch
W: Failed to fetch http://192.168.5.224/ubuntu/dists/hardy-updates/multiverse/source/Sources.bz2  Hash Sum mismatch
W: Failed to fetch http://192.168.5.224/ubuntu/dists/hardy-backports/main/binary-i386/Packages.bz2  Hash Sum mismatch
W: Failed to fetch http://192.168.5.224/ubuntu/dists/hardy-backports/universe/binary-i386/Packages.bz2  Hash Sum mismatch
W: Failed to fetch http://192.168.5.224/ubuntu/dists/hardy-backports/multiverse/binary-i386/Packages.bz2  Hash Sum mismatch
W: Failed to fetch http://192.168.5.224/ubuntu/dists/hardy-backports/main/source/Sources.bz2  Hash Sum mismatch
W: Failed to fetch http://192.168.5.224/ubuntu/dists/hardy-backports/universe/source/Sources.bz2  Hash Sum mismatch
W: Failed to fetch http://192.168.5.224/ubuntu/dists/hardy-security/main/binary-i386/Packages.bz2  Hash Sum mismatch
W: Failed to fetch http://192.168.5.224/ubuntu/dists/hardy-security/restricted/binary-i386/Packages.bz2  Hash Sum mismatch
W: Failed to fetch http://192.168.5.224/ubuntu/dists/hardy-security/main/source/Sources.bz2  Hash Sum mismatch
W: Failed to fetch http://192.168.5.224/ubuntu/dists/hardy-security/restricted/source/Sources.bz2  Hash Sum mismatch
W: Failed to fetch http://192.168.5.224/ubuntu/dists/hardy-security/universe/binary-i386/Packages.bz2  Hash Sum mismatch
W: Failed to fetch http://192.168.5.224/ubuntu/dists/hardy-security/universe/source/Sources.bz2  Hash Sum mismatch
W: Failed to fetch http://192.168.5.224/ubuntu/dists/hardy-security/multiverse/binary-i386/Packages.bz2  Hash Sum mismatch
E: Some index files failed to download, they have been ignored, or old ones used instead. 
"""
Is there anyone who know? I can not fix it , and some Packages can not be used!
Help!! 
Thank you all.