dns fails registration in windows 2008r2 cluster

taken from: http://jaminquimby.com/joomla253/servers/81-windows-server/windows-server-2008-r2/473-cluster-name-resource-failed-registeration-in-dns

In DNS Management (dnsmgmt.msc):

1. Find the VirtualClusterName that is failing to register.
2. Right-Click Properties.
3. Select Security Tab.
4. Click Add.
5. Click Object Types.
6. Check off “Computers“; uncheck other options selected.
7. Enter in the name of the cluster (a.k.a Cluster Name Object (CNO)).
8. Click Check Names; Verify that the entry has been found.
9. Click OK.
10. Give the CNO FULL Control over this record.
11. Click OK.