[Fedora-livecd-list] Failed to find group 'core':No groups available in any repository

[Pollux Su]

Hi all:
    I'm a newer of livecd-creater.When I am creating live cd,"Failed to find
group 'core':No groups available in any repository" error message
appears.Following is my steps:
    1.Make a local repository:
          cp /media/Fedora8/Packages/*  /var/www/html/yum/base/.
          createreop /var/www/html/yum/base
    2.modified the /usr/share/livecd-tools/livecd-fedora-minimal.ks file,
Just changed the repo line to:
           repo  --name=fedora8  --baseurl=file:///var/www/html/yum/base
    3.execute the command:
          livecd-creator
--config=/usr/share/livecd-tools/livecd-fedora-minimal.ks
--fslabel=Fedora8-Minial


........
Retireving file:///var/www/html/yum/base/repodata/repomd.xml...  ok
....
Error creating live CD: Failed to find gourp 'core' : No Groups Available in
any repository


Please help me. Thanks in advance!
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