Please make sure that the Active Directory account that you will use to start the Netprobe has enough permission to access the Netprobe's working directory.
If the Active Directory account is not a member of the local admin group some plugins might have problems accessing the host's performance counters. To avoid this, you may add the Active Directory account to the Performance Monitor Users and/or Performance Log Users group/s.
You can modify the default Netprobe user to a user present in the Active Directory by changing the "Log on as: This account" in the Windows Services.
Note: Default Netprobe user is Local System in Windows.