Error on launching Operations Manager

I got an error when starting the Operations Manager or even the Service Manager Console. The error says:

Operations Manager
Failed to connect to server 'scom.lab.rickygao.com'
The Data Access service is either not running or not yet initialized. Check the event log…
I'm not sure why this error came up. My SQL Server is up and running and I don't understand why it is failing. Kindly please help me.
