there are 2 modules installed. But what do they have to do with the compute units? One switch is not used at all at the moment.
If you have two switch modules installed, the most common cause is admin link.
From the CMM GUI, choose System | Switches | Advanced Configuration
Mouse over any port and choose Port Configuration
Select Port | 10G.XC | Admin Status - if it is not already set for Down, set it for Down. Do the same thing for
Port | 10G.SC | Admin Status | Down