[Users] Fwd: Failed to install Host Unsupported network manager configuration.

Hi everyone. After installing ovirt-engine with the all-in-one plugin, the local_host is not correctly working. Clicking on it raises this error: "Host installation failed. Fix installation issues and try to Re-Install". If I click on Re-Install, i get the following error: "Failed to install Host local_host. Failed to execute stage 'Misc configuration': Unsupported network manager configuration." Additional info: The host is a CentOS 6.4 machine, using the repo http://resources.ovirt.org/releases/ovirt-release-el.noarch.rpm. I tried everything I can, and I searched everywhere I know, and I found no solution. Can anyone help me? Thanks.