Hyper-V Dynamic Memory Demand Blank

Hi,

im wondering about a blank Memory demand Value at a virtual machine on my Windows 8.1 with enabled Hyper-V Feature. Inside the VM the OS is Hyper-V Server 2012 R2. I tried to update the Integration Services but they are actual already. Here is screenshot of the Memory Monitoring i get in the Hyper-V Console:

Can you help me guys?

Thanks

Michael