Hyper-V Machines Server 2012 R2 not showing in BE 2010 R3 update 4

Hello,

I am not able to see all my hyper-v machines on a Windows 2012 R2 Datacenter. The console only shows one or two (randomly) of ten virtual machines running in host. 

I have another Windows Server 2012 (not R2) and the console shows all virtual machines.

The agent for Hyper-V is installed and updated.

Does BE support backup 2012 R2 Hyper-V?

Thanks in advance.