CSV Software snapshot life cycle management mechanism doesn't work at all

Hello.

I have Hyper-V cluster on Microsoft Windows server 2012 R2 update1. Free space on one of the CSV constantly decreases during the backup of VMs that are on this CSV. In the System log a node that owns this CSV there are a lot of entries like:

"Volume CSV03_HDD (\Device\HarddiskVolumeShadowCopy2884) is healthy.  No action is needed." Event ID = 98

I think there is a constant increase in the number of snapshots on this CSV.

I want apply SnapshotAgeLimit value from http://support.microsoft.com/kb/2935810 , and set it to 1. But nothing has changed.

Is there a way to forcibly remove old snapshot on CSV ?