Client Management Suite

I have ITMS 7.1SP2 installed an am noticing that many of my virtual machines that have successfully ran a Full Inventory are not converting from Computers to Virtual Machines.  Can someone please explain to me how the SMP determines which machines are virtual machines and then what process actually does the conversion?  In addition, has anyone else had this issue before where machines are not being marked as virtual machines that should be.  Any help would be appreciated.  Thanks in advance.

It used to be a scheduled task. However I couldn't tell as my virtual systems (using VirtualBox) are not reported as virtual ;-).

Can you check from one of the systems (virtual that reports as virtual and virtual that don't report as virtual) which dataclasses are populated?

One of them should include the virtual information and we should be able to get back to the solution that owns the class from there (and find out how it happens in detail).