I don't understand it... I rsync the centos folders and also changed the /etc/yum.repos.d/CentOS-Base.repo file but when I try a yum update, it says the mirror is unavailable...

Here is the file :
/etc/yum.repos.d/CentOS-Base.repo

[GalacNet CentOS Local Mirror - base]
name=CentOS-$releasever - Base
baseurl=http://mirror.galacnet.com/server/centos-mirror/$releasever/os/$basearch/
gpgcheck=1
exclude=kernel*,yum*,centos-yumconf*,httpd*,mod_ssl*,sendmail*,procmail*,imap*,nss_db*,pam*,pwdb*,webalizer*,sysklogd*

#released updates
[GalacNet CentOS Local Mirror - update]
name=CentOS-$releasever - Updates
baseurl=http://mirror.galacnet.com/server/centos-mirror/$releasever/updates/$basearch/
gpgcheck=1
exclude=kernel*,yum*,centos-yumconf*,httpd*,mod_ssl*,sendmail*,procmail*,imap*,nss_db*,pam*,pwdb*,webalizer*,sysklogd*

#packages used/produced in the build but not released
[GalacNet CentOS Local Mirror - addons]
name=CentOS-$releasever - Addons
baseurl=http://mirror.galacnet.com/server/centos-mirror/$releasever/addons/$basearch/
gpgcheck=1
exclude=kernel*,yum*,centos-yumconf*,httpd*,mod_ssl*,sendmail*,procmail*,imap*,nss_db*,pam*,pwdb*,webalizer*,sysklogd*

#additional packages that may be useful
[GalacNet CentOS Local Mirror - extras]
name=CentOS-$releasever - Extras
baseurl=http://mirror.galacnet.com/server/centos-mirror/$releasever/extras/$basearch/
gpgcheck=1
exclude=kernel*,yum*,centos-yumconf*,httpd*,mod_ssl*,sendmail*,procmail*,imap*,nss_db*,pam*,pwdb*,webalizer*,sysklogd*

#additional packages that extend functionality of existing packages
[GalacNet CentOS Local Mirror - centosplus]
name=CentOS-$releasever - Plus
baseurl=http://mirror.galacnet.com/server/centos-mirror/$releasever/centosplus/$basearch/
gpgcheck=1
enabled=0
exclude=kernel*,yum*,centos-yumconf*,httpd*,mod_ssl*,sendmail*,procmail*,imap*,nss_db*,pam*,pwdb*,webalizer*,sysklogd*

#contribs - packages by Centos Users
[GalacNet CentOS Local Mirror - contribs]
name=CentOS-$releasever - Contribs
baseurl=http://mirror.galacnet.com/server/centos-mirror/$releasever/contribs/$basearch/
gpgcheck=1
enabled=0
exclude=kernel*,yum*,centos-yumconf*,httpd*,mod_ssl*,sendmail*,procmail*,imap*,nss_db*,pam*,pwdb*,webalizer*,sysklogd*

#packages in testing
[GalacNet CentOS Local Mirror - testing]
name=CentOS-$releasever - Testing
baseurl=http://mirror.galacnet.com/server/centos-mirror/$releasever/testing/$basearch/
gpgcheck=1
enabled=0
exclude=kernel*,yum*,centos-yumconf*,httpd*,mod_ssl*,sendmail*,procmail*,imap*,nss_db*,pam*,pwdb*,webalizer*,sysklogd*
Anyone tried this before?