Drivepool Perfomancedata / WMI missing

hi,

there are some performancecounters missing in permon.exe or in queries over wmi.

PerformanceCounterType: "Logical Disks" or "Logical Drives"? Don't know exactly because they are written in my native tongue.

WMI Query: "select * from Win32_PerfFormattedData_PerfDisk_LogicalDisk where Name="D:""

Counters like "Bytes/s", "Bytes read/s", "Bytes write/s", "Activity (%)" are not showing any values.

Some are working fine ("Free Space (%)")

The performance overview in Drivepool is working fine (showing read / write / file).

Any fix for this? Already did a reset of the performancecounters in windows.

DrivePool version is  2.1.1.561. OS is Server2012R2.