[Users] Not able to add node 2.3 to ovirt-engine 3.1

Good morning, I have installed oVirt 3.1 over Fedora 17. When approving oVirt node it is added install fails. There is no output to engine.log or vdsm.log in the node whatsoever. It just fails. Is there a particular ovirt-node-iso version to be used with version 3.1 of the manager? Only problem I see in the system is that sometimes service libvirtd complains about not finding /etc/libvirt/krb5.tab and virsh is not accesible. Regards, Jose garcia