yum - install acpid

Following commands run correct in XenServer 6.5:

1. yum --enablerepo=base --disablerepo=citrix install acpid
2. service acpid start
3. chkconfig acpid on

So i can switch off the server by pressing then "PowerButton"

Now I tried it in a new XenServer 7.0 and the Result is:
-----------------

1. yum --enablerepo=base --disablerepo=citrix install acpid
   Loaded plugins: fastestmirror
   Error getting repository data for citrix, repository not found

1. yum --enablerepo=base install acpid
   Loaded plugins: fastestmirror
   One of the configured repositories failed (Unknown),
   ...
   Cannot find a valid baseurl for repo: base/7-2.1511.el7.centos.2.10/x86_64
2. ping google.com
   PING google.com (216.58.213.206) 56(84) bytes of data.
   64 bytes from ham02s15-in-f14.1e100.net (216.5...
   -----------------

I have no idea anymore. Is any solution for this problem?