Problems when upgrading from version 6.2 to 6.3 RHEV-H

When I upgraded to version a Hypervisor to  rhev-hypervisor6-6.3-20120926.0.el6_3.noarch. The previous version is version 6.2  (20120209.0.el6_2).

The problem is that the hypervisor does not display any information, but if it appears on the RHEV-M :-?