In the last week I installed VMM 2012 and I made the integration between VMM 2012 and SCOM 2012 and everything was fine. After some days, when I opened the VMM 2012 and checked the integration with OM 2012 I found error says:
I have re-checked the Registry after the update and the key was not updated automatically, so I updated it manually and then I restarted the service.